Poster identified as Grishka
May I remind all of you what "political correctness" originally meant: using language to defend certain groups of persons against (alleged) discrimination, even at the expense of "ordinary" correctness, in order to win/keep them as political allies. The word "political" was used as a qualifier, analogous to "socialist" in "socialist freedom", "socialist competition", etc. Insulting ones alleged opponents such as "whiteys", perceived fascists/capitalists, or religious persons was considered perfectly PC.

Respectful and non-offensive language is quite a different thing. Sensitivity changes and depends on the historical context. We had lots of relevant threads (e.g. this one and this one).