i would hope
you don't count anyone who has different beliefs
as your automatic sworn enemy

If that would be so, my mom would have been my automatic sworn enemy and I would have been hers. Since this was not the case, I saw that relationships are complex and what I dislike and disrespect about another human being, needs not to condemn him or her on the whole.
But I was direct towards her and she towards me. We had our battles and debates.
It's better to fight openly than in secret.

is that the "religious differences" are superficial distraction.

I know what you mean.