I think trauma made me racist
How did trauma cause you to be a racist?
It made me suspicious of other races.
I think it's better to take traumatic experiences and try and channel them into personal growth.  It sounds like you did the opposite and I suggest you get some help.
I'm feeling pretty good since I hurt those black people by being a racist.
So you are taking your bad experiences and making more bad experiences for others, how does that help. Please consider seeking treatment for your trauma, so you can be a better person.