Stop Hate others while they don't do anything bad to you!

Why people tend to hate others that they dun even know. for eg: Jolin Tsai, Jay Chou, Jessica Alba or Justin Bieber, ok let tk Justin as eg, I m not really a fan of him but I admit that he's a great singer and dancer, even though i dun like it but i still hv no point to hate him cos i dun even know him and he dun even know me. he didn't do anything bad to me. Some even said he is ugly, if he is ugly then all those girls wouldn't after him and screaming till our eardrums almost explode when saw him coming out. There is no point to hate anyone if you dunno them. People who hate others without any reason are dumb! Stop the hating!