Hate, segregation and violence doesn't come from nowhere.
Hate-based violence and genocides start with words:
Hitler comparing Jews to vermin; immigrants being compared to animals.
Millions of people have been studying and teaching this for the better part of a century.
It isn't a secret.
Bias, bigotry and discrimination lead to violence.
It starts name calling, then identification and segregation, and efforts to turn the population against certain groups (Native Americans, immigrants seeking asylum, Muslims, Jews, gays and the list goes on....)
What happens next is up to you.
Did you study history?