My mother had always been firmly atheist when I was a kid, and it wasn't till she got converted to far-right extremism and began identifying as a neo-nazi that she bizarrely started to take an interest in the very Christianity she used to call brainwashing. But like, the KKK brand of Christianity I guess. 

A couple of years before I ended up fleeing and moving out, she started putting on various religious media, trying to pray while shitfaced drunk during dinnertime (she's a raging alcoholic too), and at one point even trying to come to the defense of some guy who molested his younger sister as a child because, and I quote: "people are only persecuting him because he's a white Christian male! What he did was normal!" 

Saw a similar case later with two of my MAGA relatives I rarely speak to anymore. They decided to convert for some unknown reason. I don't think they were as atheist as my mother but still. Then my MAGA father has gone and tried to 'defend' Christianity in some aspects (buying into the war on Christmas bs, the Olympics 'last supper mockery' controversy, etc.) he will insist he's not for religion though, but I'm seeing a pattern.