That's the problem. There is a concurrent federal criminal case pending on that very issue, and it is going to require a lot of evidence in the face of a sturdy defense by Trump to reach such a finding. Where is the extensive fact finding with evidence and witnesses in the Colorado case, and the participation of a defense team?
This will probably be struck down by the U.S. Supreme Court.
This clause in the 14th Amendment was targeting former Union military officers who fought for the Confederacy.