It's a worthwhile effort. If you just go with the first thing that goes through your head, you're probably repeating someone else's meme.

It's a shitty thing to equate islamic terrorists (Al-Qaeda, in this case) with Islam. Al Qaeda kills eight times more muslism than non-muslims: http://www.spiegel.de/international/world/surprising-study-o...

And Daeh is killing muslims and blowing up mosques: http://www.thedailybeast.com/articles/2014/10/07/isis-s-grue...

The idea that this is a clash of civilisations, rather than terrorists seeking to control co-religionists, is designed to drive both sides to their respective extremists.