Naive of the artist, to say the least. I understand what he was trying to do, but he needs to relate to reality a bit more - some of the other signs were iffy as well - the fat-people one especially. An apology and a bit of growing-up suffices.
Just about everything is a hate crime. Just about everyone gets offended by anything even if it has no impact on them.
There should be no art and no comedy, there should be no discussion.
From hate crimes and cultural appropriation to safe spaces. We are losing our ability to function without a dictate on how we should feel, what we can say and see.
I will be (only just) in my grave when the mystopian society of ultra political correctness we are becoming takes over the asylum.