You're right and the two people who have already replied to you are a great example of how people on the internet love to chime in to "correct" someone about some detail of what they said that misconstrues the point. Obviously when the previous user said "extremely radicalized people" they were talking about the kinds of people radicalized to the point that they're willing to start killing people. You rightly (imo) point out that there aren't that many of them. Then two people chime in to "correct" you.

Perhaps writing this reply makes me one of those people as well.