Yes, I have a relative in this category.
I understand why people are atheists, or have a skepticism about spirituality. But, my relative, a former devout Christian, lost a marriage and family due to his own bad behavior, and blamed their adherence to Christianity.
He now seems on a mission to prove every Christian wrong.
This newer brand of atheism seems to dovetail with modern progressivism. At least, he seems to be a radical leftist, as are many of his atheist friends.
It seemed to me that it was less about religion and more about getting even with his ex-wife.
Here is the story (I think) or maybe one of many....
It has been so many years but I think that it might be a different person. Anyway, the story is the same — divorced atheist father, mother is Christian....
http://www.sfgate.com/news/article/Atheist-dad-ready-for-date-at-top-court-2804688.php
The guy has a vendetta, IMO. The question: did his atheism come before the divorce or after. And did he become militant after?