Love is a pretty powerful emotion, if it's strong enough and directed at something truly worthwhile. The thing with hate, though, is that someone could hate the most trivial thing, and give them drive. It's simply easier to see the flaws, or wrongs in the world, than to see the good in it.
In the end, it does come down to the individual, but hatred is usually a stronger driving force. It doesn't mean hatred is evil, in itself. After all, one can have lost a loved one to an illness, or to murder, and they can thrive off their hatred for sickness or criminals, and become scientists or a law enforcer. But doing something out of pure love is simply something not easily done. It's human nature to be greedy/selfish, and while not everyone will admit it, people will more often than not do something charitable so that they can feel good about themselves. It's not to say that that's wrong, it's perfectly fine to want to be happy and feel good about yourself, but if doing something out of love has a bit of selfishness to it, then think of how strong a driving force hate is, since it is more often than not entirely a self-serving action they're doing, out of hate.
