xcode_
Look on the life of Prophet Muhammad for instance (you'll find plenty of non-Muslim accounts on His life that are non-biased) never you'll find any instance where he punished someone just because he ridiculed him.
Forget about prophet, just when Europe was going through the dark ages and Muslims were building knowledge cities in Spain etc. There were departments specifically reserved for scholars to come and discuss and question each other's religion! It's part of our history books, and a fact.
What we're seeing today is some radical Muslims dominating the majority and just because they have taken up guns people have started associating violence with Islam.
Do you know that the most number of people that have suffered from these extremists are infact Muslims themselves? I'll urge you to dig this further :)
p.s "Islam" when translated to english means Peace. Do I need to say any further?