It seems to keep popping up in the press with the H&M wedding.
I was trying to work out why I have such a strong aversion to it. Maybe it's too pretentious? I do charity work as the majority of people do (even if that's just helping out a homeless person or donating to food banks) but if I was described as 'humanitarian' I'd mentally run a mile.
It's just so odd to say you're not anti human. I can't quite pinpoint what I dislike so much about the word but I expect someone here will be able to! Maybe it's just using a job term for a natural instinct to take care of others.