The reason for prosecution is not "justice" or "guilt," but rather to politically damage President Trump. Indeed, conviction isn't necessarily a requisite. It is a clear call for political use of the judicial system. Inasmuch as this represents the thinking of Trump's opposition--which it does--it presents the ultimate justification to resorting to Federalist 46 State action to end this opposition's ongoing insurrection against America.
From "Trump might have to be prosecuted to save American democracy, an expert on authoritarianism argues," Charles R. Davis Jun 14, 2022, 8:22 PM https://www.businessinsider.com/interview-historian-ruth-ben-ghiat-on-donald-trumps-attempted-coup-2022-6
Interview with Ruth Ben-Ghiat, "a historian at New York University,... an expert on the rise of fascism in Italy and... author of the the book, 'Strongmen: Mussolini to the Present,' tracing the erosion of democracy from Russia to the United States of America."
