Does the positive side of tribalism/racism outshine the negative side?

[tackattack]

No argument on your last. That is a subjective call for each of us.

If love of the good does not create the hate of evil, then where does the hate originate? What causes it?

Do you see us living in a dualistic world? 

I sure do.

Regards
DL

I'm more a pluralist than a dualist I believe. But for the purpose of this conversation you can consider me a non-monist.
A biblical literalist would say that God created everything, including hate. I personally would say that God has given Humans the ability to feel emotions of a full range that includes hate. In that sense I would agree that God creates the opportunity and ability to hate. God also hardens the heart, according to scripture. I believe people can also harden their own heart.

I believe that there are 3 primary affects in the mental space for emotion: reward, punishment and fear, I believe hatred forms from from a combination of the later two.
Love of good, is just that love of good, is doesn't precipitate anything necessarily. Historically I would say that typically Love of good is followed by tolerance of the bad, rather than hatred of it. Hate originates the same place it does for all of us, in the mental.