What could make someone have such hatred that they would take a gun to a church and kill nine innocent people?

Generally you'll find that such people have something seriously wrong in the head. Like every other part of the body, the brain can go bad, with tragic consequences.

Coming from a biracial person myself I want to say that white people are fckin crazy now black are too but they wouldn't shoot up a church maybe your car but not a religious building

I doubt anything could make a mentally stable person do that. The person who did that must have some mental disorder.

MENTAL DELUSIONS, PROBABLY CAUSED BY SEVERE DEMONIC INFLUENCE.

THAT'S WHAT HAPPENS WHEN YOU DON'T SEEK SPIRITUAL SOLACE IN THE ARMS OF JESUS.

WITHOUT THE HOLY SPIRIT YOU'RE UNPROTECTED!!!

DEMONS WILL LATCH ON, AND INFLUENCE YOU, WITHOUT YOU EVEN KNOWING.

Ask an ISIS soldier why they slaughter people.

a disturbed childhood and lack of social contact.

good luck