They're just jealous that don't have him. Yes he can be a controversial player. Yet by the same token.. he's one of the most talented players on the planet. I for one am very glad we have him.. The game needs characters. and Suarez is a character.
Now as I didn't actually see any video evidence regarding the handball incident. All I can say is that in football we play to the whistle. If the ref blows the wihistle the game stops.. Otherwise the game continues. As the linesmen didn't alert the ref, and the ref himself didn't blow the whistle then no infringement took place.