Hating someone for doing something he can't control is bonkers to me. As baffling as religious people who tell you everything we do has already been pre-planned and we are only here to carry out what has been planned for us but then proceed to tell you God will send people to hell who do things he doesn't like (including those he himself had already planned).
Look, we all don't know Suarez personally, we rely on what those around him say about him to help us form an idea of who he actually is. Even dismissing what psychologists say, it doesn't just add up that a normal person would do what he does. I have heard coaches at Ajax talk about how obsessed he is with the game, desperate to play every single match even when he isn't top fit (no wonder he hardly misses a match through injury). They talk about how he plays South American qualifiers on Thursdays, lands at Amsterdam airport on Saturday morning but still insists on playing few hours later and then go on to outrun almost everyone on the pitch. It just doesn't add up such a footballer would then go about biting people for fun, knowing fully well he'll be suspended for it later, which will lead to him miserably sitting at home whilst his colleagues play world cup, CL or Copa America games. It really doesn't.
Also, the fact that he's lived in Europe (in 3 different countries) for as long as he has, and is yet to get involved in a single off the pitch incident, at an age where everything footballers do is reported on social media (twitter etc) back up what those who know him say about him, IMO.