>I doubt that any serious political scientists or historians think that democracy is safe in America right now.
Democracy is never safe, the people can always vote in a tyrant if given an enemy and a scapegoat.
In the US, it's assumed that liberty is unassailable due to the vigilance of America's armed militias and populace, yet we've seen they'll happily support an authoritarian who targets leftists and immigrants and leaves their guns alone.
And as far as anti-semitism goes, it's still alive and well, just not as overt. People talk about "the globalist elites" and "New York liberals" and "cultural Marxists" without realizing how much modern "Conservative" dialogue is just repurposing the dog-whistle terms of anti-Semites. Nazi ideals have been rebranded as scientific racism and fascism as dark enlightenment philosophy. You can literally take the scare narrative around BLM, cancel culture and "the left" and just search and replace "the left" with "the Jews" and most of it wouldn't be at all out of place in the 1940s. People still think /pol/ is just harmless edgelord kids LARPing, and they still argue the Capitol insurrection was just nothing but minor vandalism and memes.
Unlike in the 1940s, the modern framework of hatred is constructed to allow plausible deniability, because we live in a post-Nazim world, so extremism has to rebrand and adapt to survive. The people waving Nazi flags and doing Hitler salutes at rallies are clowns - hateful, dangerous clowns, but clowns nonetheless - wedded to an obsolete model of fascism that flourishes online but is too easily taken down in public. But when tyranny comes to the US, it will come draped in an American flag and carrying a Bible. It will be presentable, calm, rational. No tyrant will need to rant openly about the Jews or other undesirables, because we've all been trained to connect the dots and read between the lines, and we can all pretend we didn't know even when the bodies start to stink.