I haven't personally read the Koran, tho I've heard that most of the scriptures encourage peace, and there are a few that encourage killing.
My witness family often referred to themselves as fundamentalists and said it with pride. The only area we weren't fundamentalist was the literal days of creation thing, saying each creative day could have been thousands of years. It's an insignificant difference compared to all the other ways they are fundamentalist. What makes them radical is saying they are the only religion approved by God (not every Christian religion, only theirs), all others will be destroyed, letting people die without blood, not celebrating holidays, disfellowshipping, college aversion etc. Yes, I think Jehovah's witnesses are both fundamentalist and radical. Good thing the Bible doesn't say to actively kill those who don't believe, or Jehovah's witnesses would be doing it (not just looking forward to that day.).