A lot of the Constitution assumes a level of good faith that just no longer exists among Republicans. Anyway, by my read Colorado can still make it a state law and be totally fine since there would be no conflict, they just can’t use the 14th Amendment.
Ultimately, it’s a stupid decision based on stupid facts, the worst kind. He hasn’t yet been found guilty of insurrection, let alone in that state, so they’re just sort of declaring it’s true via a lesser standard. While it absolutely is true, it’s asinine to use an amendment that otherwise protects fucking criminal due process to then declare in a civil case someone a criminal and disqualify them from office.