I'm not sure what kind of "gotcha" this is supposed to be. Is "J" suggesting that we only hate him because he's a Republican, independent of his actual character and actions, and that we'd change our minds about him if he switched his party affiliation but kept doing the same stuff? Or is he trying to suggest that we hate him, specifically, for some "unknown" reason, and would continue to hate him even if he changed his platform and started doing Democrat things?
I mean, no matter his party or actions, he's still in the Epstein Files, so I'd say he isn't worthy of elected office and should be in jail even if he were to switch his party.
If he weren't a pedophile, he's still a racist, so no, I'm still orange-man-bad.
If he weren't a pedophile or a racist, he's still a remarkably stupid and vain person. Still not voting for him, regardless of party.
If he weren't a pedophile or a racist or dumb or vain, his policies have still killed and will continue to kill millions of people, so yeah, still despise him even if he were a Democrat.
Skipping ahead a bit:
If he weren't a pedophile or a racist or dumb or vain, and hadn't pushed murderous policies and wasn't a fascist, and hadn't attempted to tear down democracy, and hadn't harmed our international standing, and wasn't destroying the global economy, and wasn't enriching himself at the expense of the American taxpayer, and hadn't destroyed any semblance of social safety net we ever had, and wasn't a warhawk and hadn't built a private army out of the worst people from high school, and didn't have a complete disregard for truth and reality, and hadn't hollowed out reasonable discourse in our country, and wasn't the figurehead being puppeted by Stephen Miller and Steve Bannon and Mitch McConnell, and hadn't delivered the Supreme Court gift-wrapped into the hands of conservative activists, and never threatened the free press, and never wasted American money on vanity projects, and hadn't tried to distract from all of that with moldy bread and terrible circuses...
...then, yeah, I guess I might stop thinking of him as the worst American who ever held any elected office. But at that point...would he still be Donald Trump?