Why are there so many stupid bigots/supremacists/racists/id… in general on YouTube (specifically)?

They hide behind their keyboards because in reality the things they say on the internet they'd never say in person. They say all these on YouTube because in society when someone says things like that it's frowned upon, also because people don't really focus on it. And the people that thumbs up it are just as worse and are only looking for a kick out of something that really isn't as big of a joke as they all think it is.