When I was at school 40+ years ago I knew that none of my friends liked being called Paki so it predates both 'political correctness' and 'snowflake'. I don't think it's a case of being 'woke' more being sensitive to others. Or maybe not using such a broad sweep as banter. If I'm going to take the piss it will be because of your personal faults not an accident of your birthplace.
Like calling someone who can't understand this 'boomer'.
Ok boomer?