True. But you do have to not watch such videos to downplay the significance of such atrocities and leave it all as background noise. The same goes for famine in Africa, police abuses here, water contamination in India, AIDS in Africa, etc, etc...
If the ISIL videos were shown on the US and European TV news in heavy rotation, would the pressure on western governments be different?
If the death of Kelly Thomas had been covered by the national news in the same manner as more recent and famous police abuse cases, might the issues at hand be getting a different hearing at the national level? (or Lloyd Smalley and Lillian Weiss, killed in their sleep in a wrong-house drug raid - or any number of others)
The information you take in shapes your opinions and the priorities you set. Living in Greece, only a few hundred miles away from these atrocities and presumably being a Christian - one of the groups targeted by these atrocities - one could see how keeping tabs on the actions of these people would have some personal interest to our Greek Nationalist compatriot.