It is kinda amusing. In a kinda strange sorta way.
He was born in Hawaii. Get over your nutjob theories.
He could have been born on the moon and if his mama was an American, she was, then he is a natural born American. Sure he has a funny name. Sure his dad was an African and an asshole. So what?
My dad was born in Ireland. My mom in Chicago. I was born in Chicago. Guess what? I'm an American. So is Obama. Deal with it.