Well any identity you have can be used to radicalize you. If you are mentally and physically in a good state, you won't fall for it but if you are in that weaker stage, you can fall for pretty much anything.
A lot of young boys are in a weaker mental state, growing up and hormones do that.
Religion can be misused to radicalize, it is important to recognize that and not see it as an attack on how you practice religion.
At this point i just feel sorry for the teacher.