I think it says more about the general attitude of Muslims and Jewish people that in the heart of Paris, 2 Muslims were working in a Jewish(kosher) market and that one of them actually made a fairly successful rescue possible that would not have been otherwise. Those criminal terrorists WERE extremists. They weren't normal Muslims.
Nothing can excuse what those men did at the newspaper or the market. It wasn't self defense and it didn't "defend" Islam in any sort of way. All it did was make average Muslims a bigger target for haters.