If Jar Jar hadnt suggested that Palpatine should get emergency powers someone else would have. Remember Palpy has influence over hundreds of senators, he just needed one of them to propose the emergency powers. Jar Jar didnt give Palpy the powers, it was the whole Senate that agreed to do it. Anyways I dont hate or love Jar Jar. Hes funny and hes also annoying. Actually I didnt find him annoying in Ep2.
May the Force be with you...