Of course it is linked with his on pitch persona! I have never pretended otherwise, and it is the same with the racist biter/diver. I just would prefer to have players at Arsenal that I actually like. What is strange about that?
In regard to Costa, I merely pointed out that until this season he hasn't produced top class numbers, and this season has just started. It is difficult to draw too many conclusions, but I also acknowledged that he has quite a few things going for him as a player.