Of course it's not "all Muslisms". But those who claim "it's only the terrorists" or "it's all politics" do not grasp the scope of the problem, ie that globally speaking, a significant number of adherents of Islam hold ideas that are incompatible with an open society.
If you naively extrapolate from the 2013 Pew Poll The World’s Muslims: Religion, Politics and Society (which in principle represents nations with a total Muslim population of about 1 billion), 40% of these think you should be killed for leaving Islam.
If you naively extrapolate from the 2013 Pew Poll The World’s Muslims: Religion, Politics and Society (which in principle represents nations with a total Muslim population of about 1 billion), 40% of these think you should be killed for leaving Islam.
To me, that's a scary number.