Well, perhaps that's true among the hard-core partisans. Prager's problem is that he thinks that everybody in America will have to take sides and duke it out. I think that, instead, most normal folks will just take themselves out of the fight and go on about living their lives.
That's about as reasonable as asserting that you can "go on about your life" in the middle of your neighborhood gang war firefight.
Well, I may be off a little, but aren't roughly 40% - 45% on either side essentially yellow dogs; straight party voters? That doesn't leave many in the middle. I think as the parties become more polarized, even this middle will shrink; they will have to choose sides.
But what of the fully half the country doesn't even vote in any given election. I wonder where these people would stand when/if the shooting starts? Go with the likely winner?
I think that, instead, most normal folks will just take themselves out of the fight and go on about living their lives.
The problem I see with that is the liberals/socialists will not allow yer average workin' stiff to go on about his life. They are the ultimate control freaks, and as such will want to tell everyone else how to run their lives. Joe Six Pack will have enough at some point and will push back. Inevitable, IMO.
FGS