So are you rying to tell us that everytime a player switches sides he's gotta change who he supports in real life??
There's been lots of ManU players who have been lifetime City, liverpool, chelsea and arsenal supporters for example. I'm sure that it's the same with any club.
Also Adebayor idolised Kanu whilst Kanu played for arsenal this might be why he supports them. I honestly don;t see the big deal here