A lot of that is due to the British media and the way they are. Most of them are still bitter about Maradonas hand of god and have this nonsense view of British players been fair and just, and Johnny foreigner coming over here cheating and ruining our game. They must all know it's nonsense but it sells papers and feeds into the British jingoistic view of being gentlemen whilst those sneaky south americans will cheat at any opportunity.
The whole thing is nonsense, I think at this stage people love to hate Suarez no matter what he does. I also have ZERO doubt that if he moved to the likes of Man U, Chelski, Man City, the fans there would be delighted. Football fans are basically hypocrites, I personally love his little cheating/diving/gamesmanship it's insanely entertaining. I will say this though, if he wasn't such a uniquely talented player then most people really wouldn't give a shit if he was cheating or not.