Because, my fellow junkie, they (not they, ofcourse, their ancestors, silly me) had to endure years of oppression under you guys* (not you, ofcourse, your ancestors, silly me again) which is supposed to give them priveleges (it doesn't, I am so silly today).
It's much like the whole Jewsrael-thing:
"We were murdered during WWII, so this is OUR country because WE got murdered."
and respectively
"We were used as slaves for x-years and thus we need to get RIGHTS without DUTIES. And people should neglect our wrongdoings, because we were SLAVES and therefore may not be judged."
This logic is flawed, horrible and in the end this whole concept is being used as a weapon.
So there.

*Not saying "us" because, eventhough I am white, I am also Russian and obviously have absolutely nothing to do with this.

Do black guys go around saying ''Hey Snow white!'' to people?
Then why do White people get to say ''Hey Nigger!''?

That part I understand; it's just the idiots who actually think that calling people that is racist that I can't stand. And not to be rude, but the black people who call us racist are even more racist, because I would bet money, that if we made a White Entertainment channel, then they'd probably be getting sued for, "Racism", since it's only white movies.

This is why we can't have nice things. Not you, stupid people.

Pretty sure that back then, nigger was a word to describe uneducated black slaves.

Or so says my teacher.