There’s also the issue that a particular countries level of political freedom and civil liberties is a current measurement, and not contemporaneous with when the race was introduced.
Italy and Germany had their inaugural race introduced roughly 5 or 6 years after they were defeated in World War II, after being under fascist rule.
Spain had a race introduced under the dictatorship of Franco.
Brazil was under military rule when it had it’s first.
Hungary was well and truly behind the Iron Curtain.
The list also doesn’t include any countries which used to host races and also have questionable human rights records. Argentina and South Africa come to mind.
South Africa held Grands Prix during Apartheid, which was extremely questionable even back then.
I don’t think your theory is valid.