The punishment in Islam of terrorism is the capital punishment. It is stated unambiguously in the Quran. If you didn't know that you should start educating yourself instead of repeating what you hear in the media. Stopping the terrorists is a jihaad, a struggle to establish what's right and stop what's wrong. Mass murderers in the West do not represent Christianity and likewise the terrorists do not represent Islam even they say they do.
noone is saying that all of islam believes this. If you read what i said in my previous posts then you'd know this.