When they say 'never discuss religion or politics', what they are talking about is organised religion and party politics. I prefer the term 'beliefs' rather than religion. That can be whatever gets you through the day in these uncertain times. For me it's crisps, chocolate, cake ...

I think the culture of a society is more pertinent. If you live in a cannibal society, be a cannibal. Vegetarians will end up on the menu. If your compatriots rate their skill as assassins, kill or be killed.