I seriously don't get why. I guess it's all because of the media. The media controls us and makes us believe a lot of shit. There is no reason to hate anyone from any religion or culture.
If someone is an asshole, hate him, don't hate the whole religion. XD
Don't blame the media. Most of the mainstream media is rabidly pro-Muslim, and they will censor out any stories which show Muslims in the bad light. For example, in India there were recently anti-Hindu riots in the state of West Bengal. Muslims burnt down Hindu villages, forcing tens of thousands to flee to safer areas. Only Zee News had the courage to cover this story.