here is my argument, most of my friends are some flavor of christian, and christening's are happening to their kids, if I suggested to them that their kids should be brought up rhe islam way, taught about it from the start etc, they would think I am trying to brainwash their kids, but ofc doing the same with Christianity is not brainwashing, it's normal. as someone who was completely isolated from religious brainwashing I don't think someone like you who I assume wasn't can ever comprehend how fucked up religion looks from the outside, no different from any other cult.