Lol! I read through half the article going "What the...!" Then, I clicked the link. This paper is probably the best satire I have ever seen in my life. Excellent stuff, and I get it whenever I can.
However, that column Savage Love contains some of the nastiest shit I've ever read.
I think the reason the article is somewhat believable at first is 1) The Onion is very good at what they do. 2) Extreme leftists have done so much already that nobody ever thought they would do, it's not out of the realm of possibility. That's kind of the heart sinking part.