The only thing worse than being a racist, is denying that one is a racist. You do not define someone by race. That it was a "common expression" is no excuse for using it. Are we to allow racist comments to become "common"?
The Nazis would also say that I was a "over-sensitive idiot". Try using this racist expression to someone wearing an Israel Defense Forces uniform.
Watch the words you use in everyday conversation and delete those words which offend or discriminate.
Educate people not to use hate speech!
Being a racist, defined by you as occasionally using a racially-originating term without malicious intent, is the absolute worse thing a person can do, except of course for denying that one is a racist.
Really?
My Dad, occasionally using such a term without ill intent, was "worse than" a child molester, a mass murderer or a rapist? Do you really care to stick to your guns that being "a racist," especially by the very mild definition you insist on, is the very worst thing a person can be?
If so, perhaps you'd care to explain this remarkable assertion?