The Northern Alliance no doubt has a dark past. They are pretty much just a bunch of bandits and warlords. But they are certainly helping the US right now in the war in Afghanistan. Just imagine, how long this war could be going on with how many US casualties if it wasn't for them. They are doing the "dirty work" that otherwise would have to be done by US troops.
They are committing attrocities against Taliban fighters right now, but that doesn't bother me a bit. The less Taliban, the better. So far there are no reports on attrocities against civilians. I really hope there won't be any.
They are also asking the UN to help with a broad-based goverment, they are not trying to take power.
I was so glad to see people celebrating in Kabul after the Taliban left. I certainly hope there will be peace in Afghanistan soon.