First off, thanks to Michael Thomas for all he's done for the Saints. It's a shame he got injured, and the surgery didn't take (or wasn't done well, no idea). It was a long, hard road to get back to being able to play.
He's always been a very passionate and outspoken guy. The problem with that, is that it always looks bad, when the performance isn't there. That, coupled with a few too many "real talk" tweets, he just came off like a jerk. It's probably just some frustration talking, so I wouldn't really think too much of it.