I differ, in the same way I differ with people around here that spew nastiness about "Christianity". Blaming Islam for terrorism is like blaming Christianity for the Iraq war.
Now, that said, there are people who do espouse a hateful, violent form of Islam, and I do think it is a 'religious' problem from the standpoint that the people who step on to busses in Israel believe that they are doing a religious duty.
But, I can't be a hypocrite and condemn people who call Christians "abortion clinic bombing fascists' and then blame Islam as a whole for terrorism. I think there are a lot of problems in Islam, and that it is alot more widespread than the PC folks want to admit.
It won't, though, serve our purposes to make an argument that is easily brushed aside as being bigoted or ignorant. It does the bad parts of Islam a service when people make statements like Graham made. The knee-jerk reaction is to brush it off, and that gives those parts of Islam that need to be addressed a free ride.