To assume the only adversary is ISIS would be extremely foolish. Any actors within a system side with particular groups and ideologies. The Tor project maintain

To assume the only adversary is ISIS would be extremely foolish. Any actors within a system side with particular groups and ideologies. The Tor project maintainers align to an ideology shared with many other groups, just as ISIS align with a shared ideology, NSA/FBI etc share another... More likely NSA/FBI/nation-state level, or a large hacking group, although the former has clear motive here. ISIS has little motive for this. Use your common sense.