They said "they were the Boston Marathon bombers and would not kill him because he wasn't American."

Says the driver of the hijacked SUV.

The clear inference is that Tamerlan and Dzhokhar Tsarnaev were motivated by a specific hatred of Americans... in case you'd been led to think that the Chechen dispute is with Russia.

After all this talk of "dark-skinned" suspects, it seems the Boston bombers were Caucasian.

Literally.