Yes, I thought that Murray conflates targeting extremists, which I assume nobody has problems with, with 'less Islam'. I suppose his argument is that without Islam, there would not be extreme Islamists. However 'less Islam' has a sinister flavour, as if we should reduce the number of Muslims. How would you do that? Deport them, imprison them, put them in internment camps? Anything like that would tend to increase radicalization.
There is also Gabriella's point about Western violence, which is one of our primary exports!