"American people are stubbornly allergic to authoritarianism"
Literally 40%+ of Americans have voted for Authoritarianism. It's viewed as being 'tough'.
On a more pragmatic level, take the one-party state of California, and the absurd burden of its regulations. These largely prevent the construction of anything new, as seen in the infamous high speed rail project, and the restricted supply of new housing, pricing many young people out of ever owning a home. Perhaps you don't think regulations are authoritarian, yet they're enforced with the power of the state, which wields the monopoly on violence.
Shut the fuck up about both sides being the same.
One side: hey lets try to save people.
Other side: hey, how can I make rich people more rich at my own expense.
Totally equal.
Or Texas. Lets not forget if we are calling both sides the same. There are states with one party. Alabama? Mississippi?