On the one hand this is total bullshit, and people need to grow the fuck up and get on with it. Its part of the game now, fans (and sometime players) will deliberately try to provoke an opposing player to get a reaction, it goes on everywhere including Anfield. On Suarez part its born of frustration, but I doubt there are too many fans with good enough Spanish down at the Cottage to make any sort of coherent insult that he could understand
On the other hand with a potential ban hanging over him this was a monumentally stupid thing to so, even if he doesnt necessarily get a ban for this he will go on report for it and his previous behaviour is likely to be taken into account when handing out a sentence for the Evra incident (assuming he loses). He really couldnt have picked a worse time to do this, part of me feels sympathetic towards him and part of me thinks he needs to grow up and stop acting like a complete tosser all the time, I mean its something you expect a child to do