Well, first think of the typical school "loser." The bullies are picking on him, and nobody will stand up for him. What do you do? Stand there and laugh, so you, in turn, won't be laughed at? To me, that's not right.

And if that is the least extreme example, let's go to the most extreme example - the holocaust. If you're, say, a citizen of Germany, who is not a Nazi, and not a Jew (and not a homosexual, etc... let's say you "pass" by Hitler's ridiculous standards) - do you just let it happen? In essence, you're seeing the bullies pick on others. What do you do? Hope it will resolve? Yes, it may. But what if it doesn't?

At least if you do something, then you can say that you tried, rather than just "leave things to sort themselves."

-my thoughts