It's less "terrifying" than the current alternative, where people can openly support various forms of extreme violence, get away with it, and monetize on the way.
Mind you this "internet" is private biz. This is a pretty obvious "don't vomit on my rug" case. Don't like it? Find another party.
I really don't care if people "support" various forms of extreme violence by watching youtube movies. That is WAY better than supporting it by committing various forms of extreme violence.
Is there any actual evidence that these youtube videos are in fact driving people to commit acts of terrorism?
In hope they'll make people become terrorists. That is not the same as observing those videos actually do it.
Also, some of them are probably posted just so that the Western media can find them and scare the population shitless with them, pumping the huge autoimmune response we have wrt. terrorism here.
Mind you this "internet" is private biz. This is a pretty obvious "don't vomit on my rug" case. Don't like it? Find another party.