Okay I'm not a troll or anything, but I'd REALLY like to know?

I hate racism and racial slurs BUT I need your opinion on something. We were in cl talking about racist names for races. So how come my teacher DIDN'T say *n*qqer* [she had to say "the N-word] but she was able to say cracker; fully. She didn't have to say the "C-word." I thought it would be because "cracker" isn't a really powerful term; not as powerful as n*qqer but still how come the racist term for whites was able to be said? I'm Sicilian soo I don't care if she said cracker but what are your opinions?