Why are Hatians hated so much?

I know someone whos hatian and no one likes him. I neva talked to him myself just a hi and by, but everyone says hes too ugly and smells and dress like a hatian... i even asked my friend if its ok to go out with one, she then slapped me then start to scream how crazy i am... could someone please tell me whats so wrong with them? (mexicans included)