Exactly who has been treating black people like dogs? That was a crazy statement.
So because some black people alive today had great grandparents or great-great grandparents who were slaves means it's just fine for them to act like vicious animals?
Are you out of your freaking mind?
Please. You can't be that ignorant. Lynchings, Jim Crow, segregation, slavery, whites only.
The thing is cultures last for a long time. It takes generations to create them and generations to change them. Not all the time, not for everyone. But usually.