And here we find the problem. You believe that Islam is a religion of peace. Have you read the Quran? That isn't at all what it says, not even remotely. The terrorists are the ones actually practicing what Islam's core beliefs and values dictate.
It is a political and military and religious system designed to subjugate everyone. The "peace" of Islam comes when _everyone_ has converted or submitted to the political sovereignty of Islam and the rule of Sharia.
A Muslim that doesn't believe that is not actually a Muslim, any more than someone who claims to be a Christian but doesn't believe in the bodily death and resurrection of Christ is a Christian (which is to say, not at all).
While you are correct that most of Islam can be corrupted (just as most of the church has been), that will not change or "reform" Islam itself, which will still be there.
What is necessary is to expose the belief system of Islam for what it really is for everyone to see (no PC pretending, no deception, just the doctrine straight from the horses mouth). Then anyone who doesn't renounce it completely is an enemy of the rest of mankind, _by their own scriptures_, and must be dealt with accordingly. They literally declared war on everyone else already, 1400 years ago. Anyone who preaches or otherwise promotes the Quran as truth rather than a historical text, from that point on, can and should be treated as a criminal and traitor, because they are.