What's a girl to do?

There is a homeless man who sleeps next to a construction site just across the street from my apartment building. I can only assume that he leads a very lonely life. As my boyfriend and I walked past him tonight, everything was normal. He was fast asleep, tucked in like a little child. Two drunken men stumble around the corner and shout something in-coherent. Thinking nothing of it, we keep walking. Waiting for the light to turn, a crash rings out. It turns out the man was no where to be found, and the other two men had taken it upon themselves to trash his "home."

I still cannot, for the life of me, figure out what makes someone think that this is okay. What possess' someone to do such a thing? That man has not much to call his own, and you just spent the last 15 minutes destroying everything. What is he to do now?

Maybe I am the coward for not turning around and stopping those men. Isn't the one who watches, the real devil?

I surely wish there was something I could do now.