Do you think people are able to hate someone they have never met?

Sometimes... You might hate people who go to jail for murder and other crimes because you think that they're a bad person. Or maybe someone you love has been upset or hurt by somebody you've never met and that makes you hate them... Sometimes the hate is totally misjudged because they've made one bad impression or something made them look bad that wasn't their fault.
It's probably best not to but sometimes you just can't help it. It's probably best to get to know somebody before you make up your mind tough.