This was neat. Just like those who wished to affect voting patterns in elections, terrorists used youtube to disseminate visual stimuli. They might take a serious journalistic account of an atrocity, use the most horrific elements to glorify and encourage what was happening. The most extreme case was beheadings. How many kids ended up viewing this by accident?
You can feed an obsession by constant presentation of horror allied with encouragement to do the same and glorifying it, pretending that such action has religious relevance and sanction. the most vulnerable and those lacking intelligence and common sense will be the most affected and the most likely to carry out copy-cat actions. The van attacks and concert explosions are dramatic enough to bring viewers. in such ways is an appetite formed and extended. Luckily Google is now taking appropriate action against this.