I'm sorry, but I have to advocate for the reality-based community here. What's wrong with saying something that's true?
You don't want to hear it, even if it's true (although as far as I can tell, it's not). C'mon, can't you see that that's a little close-minded? What if I said, "Whoa, the guy that wrote Kubla Khan must have been high on opium when he wrote it?" Because it's true, he was. Or, "Wow, the guy that wrote Naked Lunch must have done a lot drugs?" Because he totally did. Did you know that Robert Louis Stevenson wrote The Strange Case of Dr. Jekkyl and Mr. Hyde during a furious six day drug bender, with the idea itself inspired by a drug nightmare? Hell, I've read that he wrote it twice, because his wife destroyed the first manuscript. You know how Stephen King pumped out so many words so quickly? Yeah, cocaine. And then there's the whole category of psychedelic art and Basquiat. Lots of art is drug-influenced, you can't bury your head in the sand and pretend it's not true. It doesn't make one pro drugs to accept this fact.
http://www.guardian.co.uk/society/2008/nov/16/drugs-history-literature
http://www.huffingtonpost.com/2011/04/20/the-influence-of-drugs-in_n_851643.html#s267145
http://quietfurybooks.com/blog/tag/robert-lewis-stevenson/
Well, a lot of old cartoons are racist. That's true.