Yes, coz athiests never caused any deaths, extremism, nor have ever killed anyone in the name of an ideology - oh, wait, millions dead in Soviet Russia, millions more over a much longer period in Communist China - damn, we'll just have to conclude all humans can be violent a-holes who justify their a-holeness by some outside authority, and not blame it on what they happen to believe at this rate....? Give me the jihad/inquisition/witchburning that compares with Soviet Russia's past of millions dead, or China's ongoing atrocities, and I'll concede my point. Seriously, blaming religion for sectarian violence is like blaming the pigskin ball for soccer hooligan violence - meaningless, facile and it shifts the blame to where your own sectarian beliefs want it to be.