I think a major tenet of post-trump Republicanism is roughly: "We're going to be accused of being racist and conspiracy theorists by the left no matter what we do, so there is only an upside to openly courting those members of the electorate.

People trapped in that bubble are overly confident in what they believe. They aren't often exposed to arguments and data that are contrary to what they're told to believe over and over whenever they turn on the TV. So when these trapped people are confronted with opposing arguments or data, they resort to the easy mechanisms that relieve their cognitive dissonance. "You're a racist" "You're a homophobe" "You're a white supremacist" "You want sick people to die in the streets"

If you disagree with defunding the police but with significant other parts of the Democratic platform, you can ally with these people on some issues but fight them on this issue. This is also how democracy works.

Trump attempted to stay in power even though the people voted against him. This is tyranny. Working with him, in any way, is a subversion of democracy. Anyone who is willing to work with him is, by extension, an enemy of democracy.

The only logical conclusion from your post is that you are against democracy: You argue that a policy you disagree with (defunding the police) getting implemented democratically, is a similar level of "bad" as a tyrant being installed. This means that you are willing to see a tyrant installed if the alternative is (democratically chosen!) policy being enacted that you disagree with. Seems like textbook authoritarianism to me.