I find that I don't share the same political or religious values of any of my immediate family.
My mother and sister are to my left. My sister is not religious. My mother is "new-age religious".
While I am more left than right politically, its only nominally. I am "a-religious".
The rest of my family, father, brother, step-mother and her children who I grew up with from (my) ages 7 - 19, are all quite a bit to the right, and relatively religious. One step brother, who is less than one month younger than me, and with whom I shared a bedroom from age 7-17, I would term as fairly far-right in that he has guns and, shall we say, is not a fan of the government.
I also have a half-brother (mother's side) who as far as I can tell has not a political or religious thought in his head. Of course he could just be hiding it.
What is strange to me is that, even though we (father, step-mother and that combined family) attended (Catholic) church every week, other than my step-mother (700 Club watcher...) I never really noticed any particular outward religious inclination in anyone else in the family. But now most are, to varying degrees (not sure about my younger step-brother, to he honest), fairly religious. Most have families and children of their own. Only myself (unmarried), my married sister and unmarried half-brother have no children. The ones that do have children are the more religious and right-leaning. Is that a coincidence? I don't know.
My same-age step-brother perplexes me the most. Growing up he was the, shall we say, least-conforming of the kids. Did poorly in school, "partied" (alcohol invovled, at least, but I don't think he ever "did drugs"), not remotely religious. But now he is a gun-owner and has a lot to say about any government involvement in his life. Not honestly sure where he stands on religion. I really have only seen him a few times in the last 15-20 years, and while I respect him as a person (he's smart, if not "schooled", and owns his own business), I really can't stand to listen to him "discuss" (rant and rave?) politics, which he tends to love to do. So I avoid him in general, and feel a bit guilty about doing so...
Anyway, enough rambling. But if others would like to share on this topic I think it could be interesting.