Im always interested to see the horrible Freedomite Racial Ideology carried out to its logical and extreme limits.
Personally, I think that something along those lines would be kinda ugly, repetitive, and without any redeeming value. We already know how a mass-genocide worked out in our own timeline, so why beat a dead horse? I think it would be much more interesting to see how the survivors of Freedom Party camps carry on in the years following the end of the war. Do they flee America as many survivors of the Holocaust fled Europe after WWII in our timeline? Also, if the survivors of the Freedom Party camps did flee America, would some of them carry Marxist ideologies to the Caribbean, West Africa, or perhaps even other parts of the world? What about the survivors who remain in America, would they become fanatically loyal to the US, as opposed to the Marxist who have fled North America?
I think that this would be a more interesting story to read about instead of, and then Jake Featherston finally killed the last member of a particular race.