No kind of representative government e.g. "democracy" or "republic" can work without ethnic, cultural, and religious unity.

Sounds delightfully fascist. Why do you even pretend to have an approval for any sort of democracy when Il Duce didn't?

The US has been fucked ever since giving blacks the vote

As flawed as US democracy is nowadays, there's much more democracy now at both a national and state level than in the Jim Crow era or god forbid pre-Civil War era.

by allowing large numbers of Jews in to corrupt a society which was initially built by WASPs and based on English Law.

You know that there were Jews in the country since day one, right? And yes, there were even Jews in states like South Carolina, which did not believe in democracy until forced upon it in 1865.

(one can also make an argument that even with homogeneity, the idea of universal suffrage is flawed and at the very least there should be a literacy test and a means test to avoid conflicts of interest - I think the history of the US shows clearly that letting women vote was a mistake)

Okay, so clearly South Carolina where you had to be a rich white male to vote until 1865 is what you had in mind. And you wonder why no one likes you Dark Enlightenment clowns, because when you aren't talking like Gundam villains you're spewing this sort of shit.

Top kek, dark enlightenment. Top kek.