Fascism is a political ethos that is anti democratic and believes in a capitalist state with an authoritarian government. That is fascism.
Executing Donald Trump and the ring leaders involved in January 6th is justice, they have committed the crime of treason and deserve death, he lost the election and attempted to stop the proper functioning of democracy, that is an attempt at a coup and is a treasonous act. I'm not sure if treason still attracts the death penalty in the US, (it no longer does here, but Trump is well deserving of it.) Never forget justice delayed is justice denied.