Baptizing my child because MIL wants it??

Ashley
So basically I was at my MIL's house and was cornered by her and my SIL. My SIL asked if I was going to baptize my child and proceeded to tell me that "well I'm baptizing my kids because Kate (MIL) would like it." Of course she would she always has to be the golden daughter in law (long story) So there was no question if I had any beliefs or anything it was just " hey I don't know if you're religious or not but you need to baptize your child because Kate would really appreciate it. "  like seriously??? I just said I'm not religious in any way and I look at it as religion has caused too many damn problems in this world for me to even remotely be interested and changed the subject. I was getting way too pissed to even try to continue on the subject. It wouldn't have ended well. I DO NOT believe that my child won't go to "heaven" if she does not get baptized. How should I politely put it for them so they get off my back?? Because saying what I said to them they totally dismissed it and are still saying I need to do it for my MIL 😡