But what about someone who says things in public that are in general sympathy for their cause, even partially?
What about someone who visits jihadist websites, reads their material, or re-tweets something in support?
What about someone who "has ties" in the form of relatives, however distant, who may do the things above, or even be outright "members"?
What about someone who has recently visited an area where ISIL holds some power or influence?
What about someone who doesn't shout "death to the terrorists!" quite loud enough at your local gathering?
And for all these things above, does it make a difference if the person in question is a Muslim or not?