If there were any doubt remaining...

...about the nature of Islam, I think it's pretty well dispelled by this quote:

Afghan Clerics Demand Convert Be Killed:

"Rejecting Islam is insulting God. We will not allow God to be humiliated. This man must die," said cleric Abdul Raoulf, who is considered a moderate and was jailed three times for opposing the Taliban before the hard-line regime was ousted in 2001.

Emphasis added. If moderate Muslims are insisting that a man die because he has decided to think for himself, then it's pretty clear that Islam is no "religion of peace."