No, that's not true. I'm familiar with that kind of campaign and if you're willing to believe the 'PC crowd' as you call them make campaigns about all costumes of any kind that's kind of naive.
I disagree that intent is necessary. IMO it's possible for someone to be offensive out of ignorance. Same as if I went to a different country and accidentally made a gesture that was perceived as rude - I'd be expected to admit I was ignorant of how it would come across and apologize, not blame people for being offended by a rude gesture I made.
By the way, I'm genuinely surprised and horrified at how many people think that saying that a costume is offensive means they're trying to police what others dress up as... we're not talking about someone finding it offensive if you dress up as your town's mayor as political parody. We're talking about stereotypes that still hurt people. I think it's just being a considerate human being to acknowledge that and just not do it. It's not so hard. People seem to mistake freedom for 'being free to disrespect others for no reason other than personal amusement', apparently. Getting the word out and trying to educate people, or people being upset that someone is mocking their culture in a racist way, is not exactly the same as calling for execution by firing squad for anyone caught in those costumes. I guess some people just prefer to blame others and keep being entitled.
