To convince Blues let's say that opposing eradicating the biting mosquitoes is racist since mosquitoes kill so many Africans, and that Reds don't want us to kill mosquitoes because they fear African population growth.

In practice Blues seem remarkably uninterested in the actual welfare of Blacks (or women) when in interferes with their other narratives. Thus I don't expect this to become an issue that gets Blue support for the same reason Rotherham didn't.