I feel a weird mix of anger, resentment and victimisation as a result ...
In my very similar situation I found I was torn, embarrassed and thankful.
I was torn by my dad who was a scientist as am I, acknowledged that the prospect of any god existing was far too improbable and yet found such solace in the rituals, prayers and hymns of the Maronite church.
I was embarrassed by my mother's inability to comprehend the illogic, violence and inhumanity that is the legacy of her beloved Catholic church.
And finally I was thankful that my acculturation and personality spared me being entrapped by blind obedience to stupidity. Though, I admit, aspects of this last part have gotten me into some difficulties in certain situations, like the army and corporate america.
Anyway, my point is you have nothing to resent or be angry about or feel victimized by. You're the one with his head on straight. It's the others who are all screwed up. And since you love them all you can do is sigh and let it be.