If the Antifa's go into the suburbs, I believe neighbors will work in cooperation for their collective security.
That's a citizen militia in the most basic sense.
The downside of this sort of thinking is the 'burbs are where the libs, dims, progressive, socialists are living. For the most part, these people think the rioters and looters are righting wrongs. These are the people who want to remove the Second Amendment, collect all of the firearms at whatever cost in lives it takes.
