It's not a racist comic or anything, reading it as such is reading too deep, although admittedly it isn't like the author, the supporters or anyone else are oblivious to the implications of the word, it is a blatant shock tactic.
I think it shouldn't be allowed regardless though, since alot of people are discomforted by use of slurs period, let alone by the mere name of the character and especially when we're approaching a risk where someone unaware of FANDOM's policy just runs the risk of drawing their ire by mere mention.
We're still under a highly commercial media company headquartered in California people, running a risk seems unnecessary.