That's a broad-spectrum collection of communist sympathizers and islamist collaborators. There's even some of the "free Mumia" crowd.
This isn't an "anti-war" demonstration. It's a "Hate America, Destroy America, Destroy Western Civilisation" demonstration. It's all about the hate.
There are a few names you would expect that aren't --- yet. Keep checking the list. I keep a list.txt in case they decide to pull it. Know your enemy.