Here's the thing though mate, I don't see the republicans as fascist not trump, certainly not Vance.
It's a buzzword thrown out because it resonates due to the history of fascism.
Fascism like any other system has many key markers, I'm not sure how Trump or certainly Vance hit many of these markers at all.
Again Trump isn't some out the blue nominee, he's had a prior term, if he is indeed fascist he's quite possibly the most incompetent one in history given the results
In the rally last night
they said
America is for Americans
They talked about using military force on the enemy within (last week Trump said Pelosi and Schiff were said enemy)
They denigrated immigrants.
They have cracked down on dissent and disagreement. Trump tried to refuse wildfire aid to CA and hurricane aid to PR because of perceived descent.
They've stacked the courts and pushed through laws that dont have anywhere near majority support
They've proposed bans on entire religions entering the country.
He openly admires strong man/fascist leaders.
It's all there, laid out, but you refuse to see.
edit, as to your last line.
The system of government here (checks and balances/supreme court etc.) put some road blocks in his way, made being an autocrat tough. But he chipped away at that and it'll be much easier this time.