Here's a superb refutation of the SCOTUS decision in the Trump v. Colorado case: yes, sec. 3 of the 14th Amendment bars him due to participation in an insurrection as that term was understood at the time of ratification

...therefore, I heartily endorse and recommend this article by the veteran legal historian and political scientist, Mark Graber, 

"Section Three of the Fourteenth Amendment: Insurrection," forthcoming in the William & Mary Bill of Rights Journal," 

available here:  papers.ssrn.com/sol3/papers.cfm?abstract_id=4733059&dgcid=ejournal_htmlemail_legal%3Ahistory%3Aejournal_abstractlink