Actually I don't think that's the mainstream Muslim view ... at least not at this time. However it does appear to be the view of a significant minority - say perhaps 20 or 30%. But yikes! Out of 1 billion adherents that's still 200 million of them who have gone off the deep end.
Hitler never had that many in his SA and SS apparatus - most of the Germans at the time might not have been enthusiastic supporters of his more extreme policies (the full extent of which wasn't widely broadcast), but his fanatical followers saw to it that the rest of the country stayed in line.
The danger is that if the radical elements get control the world will have a real mess on their hands.