Yup, regular as clockwork, there's already FB memes going around about Tsarnaev becoming a U.S. citizen on 9/11 last year, as if this somehow "proves" a damned thing about immigration policy. Plus, of course, "Muslim" bla bla bla.
Adam Lazna: Born an American citizen. Caucasian. Catholic. Slaughtered 26 in Newtown.
Jared Loughner: Born an American citizen. Caucasian. Religion unknown. Slaughtered 6, wounded 12 more in Tuscon.
James Holmes: Born an American citizen. Caucasian. Lutheran. Slaughtered 12, wounded 58 in Aurora.
Plenty of home-grown pieces of shit of all (or no) religions as well as foreign-born pieces of shit of all (or no) religions, just as there are plenty of home-grown good people just as well as foreign-born good people.
Move along, people. Nothing to see here.
Update: By request, I've whipped up an image version: