Ruby he never advocated it.
Not being able to be honest and do something about it messes up peoples head.
A terrorist attack happens. First thing everyone is on their soap boxes telling everyone not to get mad at Muslims instead of telling Muslims stop killing innocent people. Some very angry people are liable to crack. Its not justification its cause and effect.
Also as we all know cognitive dissonance has a bad effect on people. Constantly trying to convince everyone Islam is a religion of peace while they turn Europe into a war zone is bound to make someone snap.