There are reasons to avoid being called racist, or not being PC, but anybody can call anybody anything - it's the arguments that matter. Fearing participating in a discussion and maintaining views carries a possibility of being wrong without correction, which should reasonably be avoided.
Unfortunately we don't have ways of reasonable exchange of opinions in our populism times.
Legal system was put in place to prevent mob rule. Internet has again enabled mobs to go around and freely harrass, bully and target individuals in order to enforce their own ideals, instead of what is written in the law.
What makes someone upset is not the same what is unjust.
Unfortunately we don't have ways of reasonable exchange of opinions in our populism times.