If it was an image or a tweet on blowing up an airport or something like that, it would've been removed instantly and the person charged with an act of terroris

If it was an image or a tweet on blowing up an airport or something like that, it would've been removed instantly and the person charged with an act of terrorism, to spend rest of his good life in prison. But inciting some one to rape seems to be completely acceptable under the rights of Free speech ?