No worries. It’s a short read as far as essays go. Both the Nazi and Fascist parties were authorization but neither were left or right in the modern US instances. Eco’s whole point was to divest the cultural and time trappings of this brand of authoritarianism into a general definition of modern populist authoritarianism. It’s a good read.
I’m late to this, but I think you were unfairly downvoted for asking a legitimate question. The modern definition of fascism that is separate from the Italian political party comes from Umberto Eco’s essay Ur-Fascism: https://theanarchistlibrary.org/library/umberto-eco-ur-fascism
His 14 points closely align with the US Christian right wing and more generally the rise of right wing authoritarianism globally.