That stuff is not taught at school in the Christion religion course. But I dont know about America. I think you dont have this. So that is not really a danger.Tribal affiliation and fellowship. They do evil for good reasons. Forgivable because they are misguided by their selfish gene. Modernization is killing what you and i dislike, but we should continue cutting out those poor miss-guided Christian, one at a time.
I try to be gentle but must always resort to tough because they are naturally obtuse. So are you and I to some extent for what we live.
But the religious affiliation (tribal affiliation) is the same as the teams in sports or nationalism. You have usually only empathy for your own team or nation and care if they lose or win but not the other teams or nations.
The law-of-one explains this very good.
There is a ego (second chakra) and a groupego (third chakra). So you have to have not only compassion, kindness and respect for you and others, but also your groups and other groups to love unconditionally. Love is defined as having infinite worth in wikipedia. That is a good definition.
You have to remember this on an individual basis and on a group basis.
The normal spiritual people forget about the group basis and think that if you love your own tribe that is already "real love" or "unconditional love", but that is also negative as long as you do not love every group including your own.
That is also the real teaching of Jesus as far as I know.