Guerilla seems to be a relative term in the news lately. It's difficult to differentiate between Guerillas,
freedom fighters, and
terrorists. All three practice
guerilla warfare.
Bluntly put, Freedom fighters are supposed to be the "good guys" by the international media because they practice guerilla warfare against a wrongdoing government. Good fighting evil.
Terrorists are those who are "bad" because they practice guerilla warfare against a good or peaceful government. Evil fighting good.
Guerillas are more broad. If the media can't make up its mind over who's good or not, the people in question are branded "Guerillas." They could be good or bad, we're just not sure who to support yet. Nowadays it's sorta overused, like the term "hacker".
Do they all practice guerilla warfare? Certainly? Do innocents die? Sometimes. Are they doing the right thing? That's tricky. They're well-intentioned (who isn't) but do the ends justify the means?