"I doubt any of the anti-illegal protesters would try and injure a cop or anyone else."
Agreed. But it is downright provocative for the Minutemen to stage their march in an inner city area such as this.
I support their right to do so. I also suspect they intended to put themselves in a situation like this, to inflame passion and let the other side misbehave.
If that is the case, it worked. Not sure if it is a wise or good thing, or not.