You are not minimizing his comment or mocking the jerk in question.

Even here, you minimize the offence and its effect by equating it with the use of profanity.

Profanity does not hurt identifiable groups. Racist pejoratives do.

You minimize the real offence of racism, which causes serious harm to both the groups insulted and to society at large, by comparing it to the use of profanity, which may be vulgar but is nothing more than that.