I am very impressed by them and what they do.
Here is a collective with no central figures that has the ability to act as a unit. It is spectacular. Putting aside the morality of what they do and how they do it, the very fact that they do it is a wonder. It is like mob mentality on a global scale that spans days, weeks, months and maybe even years. They are almost a sick parody of humanity, and instead of something from a book or movie, they actually exist. Stuff like that doesn't happen in real life, or at least the real life that we measure things against, regardless of what real real life has to say on the matter.
As for the morality of the issue, they are jumpy, aggressive and irresponsible. Any charismatic figure can point to these flaws and make their cause look immoral, because as we all know, anything coming from a flawed entity must not only be flawed, but innately evil, thus why no politician will ever stoop so low as to admit they are human and make mistakes. So they will often damage the reputation of what they fight for, when other, better thought out action would have gotten them what they want with less effort.
Unless what they want is a fight, and I'm prone to think that is the case, and it makes me not like them at all, because there is nothing worse than a bully who can cover their actions by saying they have the moral ground, even if they are right.