Saying that they're completely non-involved in the process is false. They obviously weren't "asking for it," but the fact of the matter is, if they were stronger, they could have dealt with it.
The real issue, though, is that they shouldn't have to be. It's not fair. Young kids shouldn't have to be strong enough to stand up to bullies. Adults shouldn't have to be strong enough to stand up to criminals and injustice. They should all just not happen. But they do. Life's not fair, bad things happen to people who shouldn't have to deal with them, and people suffer for it. Sympathy with the victims won't solve anything, nor will outrage over the perpetrators. We can wait for society to "fix" the bullies, but that doesn't save the early victims and it doesn't do anything to help the victims overcome the next bully, or the one after that, or the one after that.
Kids (and everyone, really) need to learn the strength to overcome adversity. They need to understand how to deal when things go down the crapper. Unfortunately, that's largely something that can only be taught by experience; we can't teach it ourselves. What we can teach are the kinds of skills that will be extremely helpful in dealing with life's problems: situational awareness, improvisation, and thinking ahead. Some schools do, in fact, teach this, at least in part, under a broader subject known as "critical thinking" (which is not focused on nearly enough, in my opinion). Learning how to "think on your feet," if you will, goes a long way toward helping anyone learn to overcome adversity of any kind, bullying included. Then we don't have to wait for the shrinks to sort the little buggers out; we've given the "victims" all they need to protect themselves in many cases and prevent themselves from becoming victims at all. And that doesn't just apply to bullying.