Do you discuss the merits of flat earth or homoeopathy too?
Why wouldn't you discuss religion with your kids?
Any smart parent would want their children to be fully armed with an understanding of different beliefs, cultures, politics, sexualities, etc, and the tools to make their own informed decisions.
Would you disown you kids if the decided they believe in god, budda, the great spaghetti Monster? Of if they told you they were gay, trans, liberal, a roadie, veganor a flat earther?
You're opinions are yours, and they make sense to you, but if you expect your kids to adopt them without the opertunity to make their own decisions, right or wrong, dumb or smart, you're no better than the god bothers you think you're protecting them from.
Edit: okay, the roadie and vegan things are genuine reasons to disown your kids, but I stand by the rest.
it's a nice bridge...