The best evidence of that is what they've done and what they've said. What they've done is to surrender all of the weapons they had, voluntarily, in 2003 and 2004. They had heavy weapons and they had light weapons, and they surrendered them in return for an assurance that they would be protected. They don't sound like a group of terrorists to me.
On December 1st, 2011. See this statement in context.