Peacenik? I've been advocating military action against ISIS pretty much from day one. I just don't think that trying to beat them militarily while at the same time providing fresh soldiers is the smartest of moves.
And the problem with sympathy is that it is open to interpretation, too. I can be sympathetic about the motives behind a situation while also having no desire to join it myself, or thinking that the actions are really justified.
In the case of ISIS I have no sympathy whatsoever, but the idea that having some -- any -- sympathy means that you want to join their ranks is absurd. As is this idea.