I have received good advice from a member here that has made me realize my relationship with my son is more important than whether he keeps his guns or if he has a set of testicles.
My son is old enough to run his life as he sees fit. I do not have to agree with his choices, and it is wrong for me to impose my perspectives.
I have failed to raise him with my values wrt gun ownership and political beliefs. But it is what it is.
I will hold on to his guns for a reasonable period of time in case things change and start selling the bulk of the stuff he would have inherited.
BTW, I agree with the "hard liners" who have posted their opinions. I would never allow a woman to control me like that. I believe my son and his wife have a strong religious commitment that will help their marriage, so the chances of divorce are minimal at this point. If I push too hard, I will alienate them. If they have children, I would not see my grandkids much if at all.