Well, ok, I disagree that because of two incidents he should be labled with that reputation. But we'll have to agree to disagree. As for the incidents, the slap was stupid, uncalled for, dirty, and desperate, but he didn't get away with it. He was called out on the play, and admitted his mistake after the game. He took full blame for the situation, if I remember correctly. It would be one thing if he stood by what he did, but he admitted his wrong-doing.
As for the slide, that was also unnecessary, but it is not as clear cut. He didn't back off what he did, because he didn't feel he did anything wrong. What he did was excessive, and once again unnecessary, but was it really flat out dirty. The problem here is that I think he takes more flack because he is the highest payed player in baseball. Once again, we'll have to agree to disagree here.
The point is, he has made mistakes. But is it really necessary to jump on everything he does. Some like him, while others don't, and, in all probability, nothing will change that.