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: theanarchistlibrary.org/…/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.