When someone says, "I hate George W. Bush," do they mean the person or do they mean the politician?
If you hate the person, then you're being callous. If you mean the politician, then you might have some legitimacy. However, 'hate' is a strong word. A more appropriate word would be 'dislike.' And why would you want to hate George W. Bush, the politician? What did he do wrong?
Seriously, if you're living in Baghdad and the President allows an air-strike that misses it's intended target and instead, kills your family, then maybe you have a reason to hate him. But if you're living in a swanky condo or your parents' basement (take your pick), eating Cheetos, drinking a can of Red Bull, and looking up Mr. Plow clips on YouTube, then what the hell gives you the right to say "I hate George W. Bush?"
Think about this, you're chilling in your palace (again, take your pick), balancing your laptop on your stomach, waiting for your significant other to arrive so you can have passionate sex, which means you're having more sex then I am. Life is good and you have the audacity to say that you hate the President of the United States?!
Look, if you want to hate him, that's your business. But at least have some justification for your hate. For example, health care, poverty, etc. But that still falls under the category of 'dislike.'