The people of Boston are no longer being terrorized by the Marathon bombers, but amnesty supporters sure are.

On CNN's "State of the Union" last weekend, Sen. Lindsey Graham's response to the Boston Marathon bombers being worthless immigrants who hate America -- one of whom the FBI cleared even after being tipped off by Russia -- was to announce: "The fact that we could not track him has to be fixed."

Track him? How about not admitting him as an immigrant?

As if it's a defense, we're told Tamerlan and Dzhokhar Tsarnaev (of the Back Bay Tsarnaevs) were disaffected "losers" -- the word used by their own uncle -- who couldn't make it in America. Their father had already returned to Russia. Tamerlan had dropped out of college, been arrested for domestic violence and said he had no American friends. Dzhokhar was failing most of his college courses. All of them were on welfare.

(Dzhokhar was given everything America had to offer, and now he only has one thing in his future to look forward to...a tenured professorship.)

My thought is, maybe we should consider admitting immigrants who can succeed in America, rather than deadbeats.

But we're not allowed to "discriminate" in favor of immigrants who would be good for America. Instead of helping America, our immigration policies are designed to help other countries solve their internal problems by shipping their losers to us.

The problem isn't just illegal immigration. I would rather have doctors and engineers sneaking into the country than legally arriving ditch-diggers.

Teddy Kennedy's 1965 immigration act so dramatically altered the kinds of immigrants America admits that, since 1969, about 85 percent of legal immigrants have come from the Third World. They bring Third World levels of poverty, fertility, illegitimacy and domestic violence with them. When they can't make it in America, they simply go on welfare and sometimes strike out at Americans.

In addition to the four dead and more than 100 badly wounded victims of the Boston Marathon bombing, let's consider a few of the many other people who would be alive, but for Kennedy's immigration law:

-- The six Long Island railroad passengers murdered in 1993 by Jamaican immigrant Colin Ferguson. Before the shooting, Ferguson was unemployed, harassing women on subways, repeatedly bringing lawsuits against police and former employers, applying for workman's compensation for fake injuries and blaming all his problems on white people. Whom he then decided to murder.

-- The two people killed outside CIA headquarters in 1993 by Pakistani illegal immigrant Mir Qazi. He had been working as a driver for a courier company. (It's nearly impossible to find an American who can drive.)

-- Christoffer Burmeister, a 27 year-old musician killed in a mass shooting by Palestinian immigrant Ali Hassan Abu Kamal in 1997 at the Empire State Building. Hassan had immigrated to America with his family two months earlier at age 68. (It's a smart move to bring in immigrants just in time to pay them Social Security benefits!)

-- Bill Cosby's son, Ennis, killed in 1997 by 18-year-old Ukrainian immigrant Mikhail Markhasev, who had come to this country with his single mother eight years earlier -- because we were running short on single mothers.

Markhasev, who had a juvenile record, shot Cosby point-blank for taking too long to produce his wallet. He later bragged about killing a "ni**er."

-- The three people murdered at the Appalachian School of Law in 2002 by Nigerian immigrant Peter Odighizuwa, angry at America because he had failed out of law school. At least it's understandable why our immigration policies would favor a 43-year-old law student. It's so hard to get Americans to go to law school these days!

-- The stewardess and passenger murdered by Egyptian immigrant Hesham Mohamed Hadayet when he shot up the El Al ticket counter at the Los Angeles airport in 2002. Hesham, a desperately needed limousine driver, received refugee status in the U.S. because he was a member of the Muslim Brotherhood. Apparently, that's a selling point if you want to immigrate to America.

-- The six men murdered by Mexican immigrant Salvador Tapia at the Windy City Core Supply warehouse in Chicago in 2003, from which he had been fired six months earlier. Tapia was still in this country despite having been arrested at least a dozen times on weapons and assault charges. Only foreign newspapers mentioned that Tapia was an immigrant. American newspapers blamed the gun.

-- The six people killed in northern Wisconsin in 2004 by Hmong immigrant Chai Soua Vang, who shot his victims in the back after being caught trespassing on their property. Minnesota Public Radio later explained that Hmong hunters don't understand American laws about private property, endangered species, or really any laws written in English. It was an unusual offense for a Hmong, whose preferred crime is raping 12- to 14-year-old girls -- as extensively covered in the Fresno Bee and Minneapolis Star Tribune.

-- The five people murdered at the Trolley Square Shopping Mall in Salt Lake City by Bosnian immigrant Sulejman Talovic in 2007. Talovic was a Muslim high school dropout with a juvenile record. No room for you, Swedish doctor. We need resentful Muslims!

-- The 32 people murdered at Virginia Tech in 2007 by Seung-Hui Cho, a South Korean immigrant.

-- The 13 soldiers murdered at Fort Hood in 2009 by "accused" shooter Maj. Nidal Malik Hasan, son of Palestinian immigrants. Hasan's parents had operated a restaurant in Roanoke, Va., because where are we going to find Americans to do that?

-- The 13 people killed at the American Civic Association in Binghamton, N.Y., by Vietnamese immigrant Jiverly Wong, who became a naturalized citizen two years after being convicted of fraud and forgery in California. Wong was angry that people disrespected him for his poor English skills.

-- Florence Donovan-Gunderson, who was shot along with her husband, and three National Guardsmen in a Carson City IHOP gunned down by Mexican immigrant Eduardo Sencion in 2011.

-- The three people, including a 15-year-old girl, murdered in their home in North Miami by Kesler Dufrene, a Haitian immigrant and convicted felon who had been arrested nine times, but was released when Obama halted deportations to Haiti after the earthquake. Dufrene chose the house at random.

-- The many African-Americans murdered by Hispanic gangs in Los Angeles in the last few years, including Jamiel Shaw Jr., a star football player being recruited by Stanford; Cheryl Green, a 14-year-old eighth-grade student chosen for murder solely because she was black; and Christopher Ash, who witnessed Green's murder.

During the three years from 2010 through 2012, immigrants have committed about a dozen mass murders in this country, not including the 9/11 attack.

The mass murderers were from Afghanistan, South Korea, Vietnam, Haiti, South Africa, Ethiopia and Mexico. None were from Canada or Western Europe.

I don't want to hear about the black crime rate or the Columbine killers. We're talking about immigrants here! There should be ZERO immigrants committing crimes. There should be ZERO immigrants accepting government assistance. There should be ZERO immigrants demanding that we speak their language.

We have no choice about native-born losers. We ought to be able to do something about the people we chose to bring here.

Meanwhile, our government officials just keep singing the praises of "diversity," while expressly excluding skilled immigrants who might be less inclined to become "disaffected" and lash out by killing Americans.

In response to the shooting at Fort Hood, Army Chief of Staff Gen. George W. Casey Jr. said: "As horrific as this tragedy was, if our diversity becomes a casualty, I think that's worse."

On "Fox News Sunday" this week, former CIA director Gen. Michael Hayden said of the Boston bombing suspects, "We welcome these kinds of folks coming to the United States who want to be contributing American citizens."

Unless, that is, they have a college degree and bright prospects. Those immigrants are prohibited.