This is a really unpopular opinion, but there is (some) responsibility that has to be taken from a lot of parents on how their children turn out. I'm not pointing this at you OP or anyone here in general, but it is been eroding for a long time now.

Raising your children with TV, drinking/abusing alcohol, not talking about these things at the dinner table when young, allowing a spouse to always get their way or walk over you, no respect between parents, sweeping problems under the carpet and ignoring the, allowing daycares and schools to raise children instead of that being supplemental and never challenging other viewpoints.

All of these things are very small issues that don't seem like they have consequences in the moment but make a large impact when compounded. Liberalism doesn't just grab anyone, it creeps in and compounds over years and years.

For any new parents, keep this in mind. Stay vigilant. Stay involved in your kids life and teach them how to navigate the world instead of teaching them to sweep things under the rug that they don't like. (This manifests later on when they say "I don't want to talk about this" or "please stop bringing this up." They are wanting to postpone looking for the truth in their actions.)