I do believe he gets a lot of undeserved hatred, but this kind of attitude has to go because it only fuels that type of hatred. He's had so many times to be humble and he always pulls something like this. Honestly, just have one of your PR people come up with a speech and recite it the next time you win an award. You can still prove to people that you're a good kid.
Oh, and you can't seriously say people should take you seriously after you just lip synced two performances.