Racism is racism. The difference is in impact/weight. Cracker came up as a means of insulting poor, rural people. It's use as a racial insult didn't arrive until the 60s. It was used by people with no real power over the white majority and no means to really marginalize, dehumanize or restrict their rights. So it's a weak sister of an insult as those things go.
When did it become 'dehumanizing' to refer to black people as n_____?
I can guarantee you it didn't have it's roots as being such. It was an archaic way of describing African people in general.
The whole 'dehumanizing' thing is well after the fact, and is on the same tier as what black people slur towards whites.
Sensationalism, political correctness, liberal guilt, etc. all culminated into a finishing product that is coming out of you right now- 'they aren't as guilty of it because...'.
No matter what, just like feminism, LGBT, and every other specialty group, it is rigged to where white people and, particularly,
hetero white men, are simply silenced and chained while they all press on them.
It's a problem, and people need to recognize that problem- not continue the same rehashing of an outdated and problematic bias.