Islam is just not the problem. It's a culture problem. The religion is no more violent than Judiasm or Old Testament Christianity. I know plenty of Muslims who are totally normal, moderate people. I went to a mosque for a funeral and a couple times for other things related to college. Sermons were very similar to what we hear in church.
This is is a complex issue. We are dealing with tribal cultures that in some places has not advanced in the last 2000 years like western culture has. We are also dealing with a significant change in economic gender roles and the economy, plus destabilization and wars which leads to a social and gender identity crisis as well as a loss of a feeling of purpose, extreme loss of the ability to provide, to be men, to have jobs, to be treated as humans. That results in revolution sometimes- either the Arab spring type youth movement that focus on autonomy, the economy and rights or to a regression to extreme fundamentalism based on a romanticism of the past Islamic empire. So they try to recreate that.
Imagine prople who who feel lost and unsure who find hope in the fantasy of a world with specific roles and rules that everyone abides by, no ambiguity, no confusion. It is the same with alienated white Christian terrorists who joined the Christian Identity Movement like Timothy mcveigh. The difference is our society is more stable and evolved so we have less home-grown Christian terrorists. If things were different though...
None of that changes the fact that we are facing a clear and present danger due to ideology. We have a problem. And it is significant.