This is true, but only to a point. FISA was enacted as a result of the Church Commissions and the rampant, systematic, cultural STASI-ism of the FBI. There was an obvious need to restrict the ability of the government to easily persecute citizens or groups by labeling them as subversive, and I don't think that it would be wise to lose these.
Stalin, Mao, Hitler and Chavez were all awesome dudes that the people loved (understandably)..............until they weren't.