Let me just chime in as the DW....
My side of the family doesn't really know we're aetheists. DH's mom is basically aetheist and knows that we are.
My family is Methodist, but they just are pushing the tradition of the easter bunny.

So it makes no sense.
We do not discuss religion with them. They know better, I think.

DH's mom just likes to buy stuff and gets offended when we turn down her crap....we have made it blantantly obvious that we don't want it, that we have a tiny house, that it's wasteful....we make it sooo clear. Regardless, she keeps trying to force stuff on us. Over the weekend, she told us she got him some rabbit thing from a customer, who got it for his girlfriend but then got mad at her and blah, blah, blah....some free rabbit toy we don't want here. So, DH tells her, "Mom, we don't really need that around here." She says, "Well, maybe Jett would like it." He tells her that Jett doesn't like stuffed toys and it would just go to Goodwill and not to give it to us. She basically said that she'll ignore our requests and bring it anyway. Grrr........