...thereby increasing the non-white population, further hastening the Great Replacement, which the right has been yearning for...oh...wait...that's backwards.

I think you're giving them too much credit for coming up with a plan here.

Likewise, the right tried very hard to get its supporters to die to COVID-19. Mostly unsuccessfully, thankfully.

The idea that this is "about" anything beyond gut-level moral feelings (sculpted by religious belief) and tribal unity require way better arguments than you've provided. The consequences are plenty scary anyway.