What’s the difference between a fascist and an anarchist who does everything they can to kneecap the only viable left leaning political party in the US?

There’s no practical difference, just window dressing. They both cheer on oppression and pain for those suffering under Republicans.

Left is literally the opposite of authoritarian. You seem to be conflating a whole lot of ideas of terminology here. You sound like an ideological leftist who has been confused by the right's deliberate language-muddying.

Left is egalitarian. That takes many different forms.
Right is authoritarian. That also takes many different forms.

Authoritarianism (or vertical/hierarchical power structure) is THE defining characteristic of the right. "Auth-left" is an oxymoron meant to distract from the fact that wealth and power are one and the same.

Authoritarianism is literally a defining feature of communism. Redefining terms to escape the reality of what ideologies look like when implemented is just dishonest.

So you are not familiar with the concept of communism.

Communism literally - by Marx and Engel's own definition - requires the "withering away of the state". As the creators and originators of the very concept of "communism", can you name one society that has achieved their definition?

Yes, I understand that Marx and Engels did not have realistic political ideals and that every attempt to implement their ideology has diverged from their utopian vision into authoritarianism when reality hits that ideology. That’s the point.

I see you moved the goal post to a different field.

If you want to criticize the specifics of Marx/Engels proposals, that is very different than - whether by ignorance or malice - outright lying about them.

I didn’t say anything about Marx or Engels. I talked about communism.

Oh dear. 🤦🏽

Pick a communist nation, any communist nation

Ok, let me spell this out…

Marx and Engels created the concept of Communism. They carefully defined it.

No nation in the history of the world has come close to meeting the criteria/definition of Communism.

You cannot pick a Communist nation because not one has ever existed. Literally. By definition.

A dictator who lies about their dictatorship is still a dictator, just as a wolf in sheep’s clothing is still a wolf.

en.m.wikipedia.org/wiki/No_true_Scotsman

Since communism has proven to be impossible to implement and every attempt has resulted in brutal authoritarian regimes, we can either say communism is an incoherent mess of a utopian ideology which can’t exist, or an ideology that de facto endorses brutal authoritarianism. Dealer’s choice