I'm going to call a racist the n-word...ironic
Why would you use that racist tactic against them?
Because I hate him and I want him to feel bad
You shouldn't say something racist to a racist. It defeats the purpose and they will learn nothing from it. If you think it is wrong it is hypocritical to do the same.
I can say anything I want and the racist can't learn from it?
Using slurs to prove a point can defeat your narrative. It can also be really hurtful to the group it is directed at.