The problems are:
they won the crusades;
they haven't progressed since then and think we haven't either;
they didn't go through the wars of religion and so don't have a cultural revulsion to same; and
they mistake forbearance for weakness, because they would not forbear.
The Germans killed a quarter of their OWN PEOPLE fighting over religious trivia in the 30 years war. I strongly suggest that intelligent or self preservationist moslems consider that statistic before approving of those picking a religious war. And that those who live in the west choose to be our allies openly and obviously.
We are nice and kind fat and soft and ridden with unearned guilt. We also have a history of savage bloodshed that makes the earth blanch.
We are horrified by what our own civilization did as recently as 1914-18 and 39-45. But we DID do it, and there are plenty of men still living who found it possible to incinerate cities full of white European babies, or throw them screaming into gas chambers for that matter. Enough of their grandchildren can be found to push the buttons.
Forbearance and measured response are still what we are doing, but we might decide they aren't effective.
And OUR jihad won't just blow up a handful of buildings and a bar and some trains and a bus. Everybody loses in a war, but some lose more than others.
Beziers, Magdeburg, Ypres, Guernica, Rotterdam, Auschwitz, Hamburg, Tokyo, Kolyma, Hiroshima, Nagasaki.
We are crazy. Maybe ought to not fuck with us too much.