Prior to the dissolution of the Senate, Senators were fairly well protected by their status. You can piece the chronology together that the destruction of Alderaan is a direct result of Bail Organa’s lack of appropriate subterfuge skills. They find his daughter on the ship with the stolen plans, Palpatine dissolves the Senate, and they destroy the planet with Bail on it (thought I don’t know if they could be sure he was there at the time). So Alderaan is destroyed due to Bail Organa’s cardlessness. That is my take anyway.