Katherine wrote Tsarnev : "They're 'looking' for you”....
Katherine's Parents were subsidizing the couple financially.
Tsarnaev's family had given Islamic names to Katherine's Parents. that they went by.
Parents no particular religion they practice...rather neutral. _
Katherine was neutral before she converted to Islam.
When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest, and findeth none. Then he saith, I will return into my house from whence I came out; and when he is come, he findeth it empty, swept, and garnished. Then goeth he, and taketh with himself seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is worse than the first. Even so shall it be also unto this wicked generation. Matthew 12:43-45
So lack of religion equates to not knowing the difference between right and wrong. And it voids common sense.