Current multicultural societies are full of people who hate each other

Sure, but as I said most aren't hating each other. See how many whites are participating in BLM protests, for one.

It doesn't happen as much as the media would have you believe especially between blacks and whites.

I don't watch the media. It's from a study.

Ancestry in 23andMe African Americans Unlike previous estimates of the mean proportion of African ancestry, which typically have ranged from 77% to 93% African ancestry,2–4,48–62 our estimates, depending on exclusions, are 73% or 75%.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4289685/