Here is the source:
I am in no way affiliated with the site. I merely googled her name to see if I recognized her and the quote came up with the picture.
Here it is in the context of the website:
I just have to emphasize one thing my position on the incident does not derive from the fact that Im a black person, on the contrary; but we have to face the truth and the only truth here is that white people have systematically oppressed and enslaved black people for more than 400 years. And I dont know what has to be done to heal those wounds, but the way I see it one traffic light beating is a good start, because it pays back hundreds of thousands of lynches, crucifies, hangings, mutilations and other gruesome ways in which white people toyed with black slaves in the past. We as a race deserve payback for centuries of black slavery and if stopping white people in their cars and pulling them out and beating them up in the middle of the street is the way to accomplish that, its better than nothing, Sanders opined.
Thx