Ok well shortly after Mace fails in arresting the chancellor and Anakin becomes vader, Palpatin gives his speech. The guy looks like a monster, sounds like a monster, is wearing a creepy dark cloak, and is suddenly announcing that all jedi are to be killed. Not one member of the senate was thinking, hold on this guy sounds kind of strange: He wants to remove democracy, create an Empire run exclusively by him and kill off our guardian jedi who have protected us for thousands of years? well he says we'll get a death star so im cool with it.