There are actual similarities in the real world among football fans, or among gathering protesters and other situations, where a majority behave but a small group don't. This little group uses the majority to hide among them and therefore manage to escape responsability for their actions. This little group doen't give a damn about the football match or what the protest is about, they just have their own aganda.
It's the same on internet, those people behave like that just because they can. They don't give a slightest effort to have a intellectual discussinon, and as we all know it is very easy to hide from responsabilty on internet
