Trump did not participate in an insurrection. The Colorado court conveniently omits a key fact, that he told his supporters to go down to the Capitol and make their voices heard "peacefully." He did zero planning to organize an "insurrection."
Furthermore, it would seem to me that a state court has zero jurisdiction to decide a matter that is entirely federal. We keep hearing from your side immigration is entirely a federal matter and that the states have zero say in it. Same thing here.
I'll also have to take a look at what Turley said, since he is a learned legal scholar who knows the precedents and laws and dusagrees with the decision.