It's all in good fun. I don't know how it started, but it's certainly not hate. Maybe it's because we're all (mostly) very white and know it. Maybe it's that taboo subjects make the best jokes. I can vouch that not one person here is a true racist. If you have a problem with something someone said, send them a message and they'll probably realize they were out of line or phrased something a little wrong. It's not black people per se, but the "nigga" culture that's being mocked.
Things operate a little differently around here in the sense that no one is censored for their speech (unless they're spamming). Everyone is supposed to moderate themselves on what is in good taste. Don't take anything you overhear personally. We're more about joking and having fun around here than serious business. Certain things may stick out more to you, but if you look around you'll see people mocking just about everything under the sun. People make fun of retards all day and Duo hasn't complained once. Wait, that was a bad example.
We're an equal oppertunity discriminator. :) So relax and keep in mind everyone likes you here and we enjoy your company. And with that tackled, you did offer to take questions and I can't refuse such an oppertunity.
Do you enjoy fried chicken and watermelon?
Do you think affirmative action is a good thing?
Do you like big butts and can not lie?
Are your dreams in life similar to that of a rap music video?
Can white men jump?