I think ISIS is only offering one option these days. If you ain’t our kind of muslim you die. But maybe I’m not picking up the nuances of the situation.
Part of my concern with Isis is: like the Taliban was at one time, other muslims (and the US) fall into a trap (or uses deceit) that Isis is evil but the other muslims, and islam in general, is not. I m not saying it is a fake propaganda outfit, but it is being used in a “good cop, bad cop” way.