Lesson No. 3: Our immigration system is one of terrorism’s best allies. Related to the last point, this is a case of just how idiotic a politically correct bureaucracy can be. The father of the Tsarnaev punks only had to declare himself an asylum-seeker afraid for his life in the Russian Federation and our consular officials fell all over themselves to get him to America.

Nobody cared that “fearful” Pops retained his Russian citizenship and passport, then voluntarily returned to Daghestan, a jihad-roiled Russian province, to live. Or that his elder son’s dream vacation appears to have been a terrorist training session.

If you’re a highly educated, ambitious West European who wants to become an American, your chances are near zero. If you’re a radical America-hater from a hostile region, all you have to do is shout that you’re a political refugee and we’ll give you residency and benefits.

There’s no reason that anyone from Chechnya should be granted a US visa. It’s a gangster mini-state (within the Russian Federation) at war with home-grown Islamists. There are no good guys. Chechnya’s sole export besides terror, Chechen mafiosi, make Mexican drug cartels look like Franciscans. And some of the cruelest jihadis our troops faced in Iraq and elsewhere were Chechens who joined al Qaeda.