70 Democrats opposed the "Antisemitism Awareness Act". Only 21 Republicans did. In Australia, the biggest supporters of the "hate crime" bill, that imposed long mandatory prison terms for making a Nazi salute and criticizing Israel, were "based right wing national-conservatives" while the few who voted against it were mostly from the far left. Right wingers are also more supportive of Indian immigration than the left, and want to make jewish corporations richer while fucking over the white working class and underclass. When did you realize that leftists are the lesser evil?
The only "horseshoe theory" that exists in actuality is that fully realized communism, which is utopian and sometimes apocalyptic, superficially resembles a far right evolian reactionary state, which is utopian and apocalyptic.
Democrats and Republicans (or whatever equivalent in whatever country you live in) resemble each other because they actually are the same. Fascism and the authoritarian left resemble each other because they're not actually that far removed. Most people who talk about "horseshoe theory" don't know what the fuck they're talking about. Don't listen to them.