I would say that you are very unlucky. I know people of multiple different religions, and atheists, and agnostics, and people of no particular belief and I have never known anyone to make a comment like that about anyone else.
I know many families whose members follow multiple different religions or none in multiple combinations.
> If a father "100% believes" homosexuals are worse than dirt, and a son firmly believes he loves his boyfriend, that's how a "quarrel" will arise.
Yes, but that is atypical. It most commonly happens either with American evangelicals, or in the context of very conservative societies in certain places (e.g. in multiple African and Asian countries).
American evangelicals seem to have a peculiar obsession with homosexuality as some sort of uniquely bad sin - perhaps to deflect attention from what the Bible and Christian tradition have to say about materialism and wealth. Traditional Christianity is quite non-judgemental and optimistic - e.g. the belief, or at least the hope, at all or almost all of humanity will be redeemed.
> To my face. When I mentioned that history knows such policies, and that they almost always lead to massacres, pogroms, and things like the Holocaust
The Holocaust was carried out by people who had to invent their own religions (their variant of neo-paganism and "positive Christianity") to have religions that could be reconciled with their ideology. Their ideas were more rooted in "racial science" than anything else.
> The Holocaust was carried out by people who had to invent their own religions (their variant of neo-paganism and "positive Christianity") to have religions that could be reconciled with their ideology. Their ideas were more rooted in "racial science" than anything else.
Some of them thought they had to invent or resurrect such religions to sell their movement to the masses, yes. That movement's actual religion was that ideology and racial "science"; it kind of was its own religion. (Not that this is exclusive to nazism / fascism; the same goes for communism.)
> I would say that you are very unlucky.
> or in the context of very conservative societies in certain places (e.g. in multiple African and Asian countries).
Also in a few European ones, I can personally assure you :) It's fortunately (much) less common today than it was 25-30 years ago, but the truth is, everybody everywhere has their own hellhole, and living there could indeed be seen as unlucky. Atheism in a country where 96% of the people adhere to folk Catholicism (outside cities, that would probably be 110%...) is a hard sell.