You’re never going to get rid of Communists on Lemmy, FOSS in general attracts Communists, combined with stable and growing Communist instances. If Lemmy.world wants to go its own way it can, but there’s already a right-wing Lemmy, that’s Reddit.
Lemmy.world probably wouldn’t last in the long run as it appeals exclusively to the median Reddit demographic too ideological to stay on Reddit, yet ill-informed on the mechanics of what made Reddit bad.