http://www.pri.org/stories/2015-02-...-imagined-and-some-fighters-and-citizens-have I've sort of wondered at this myself. How could people support a group that seems to just want to kill everyone? Also it seems fairly obvious to me that just saying we have to KILL ALL MUSLIMS is about the only thing that will keep people in ISIS at this point
Out of fear. Out of stupidity. Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. (c)