If Paul thinks that, then he is mistaken. Clearly all seriously committed Muslims want worldwide Islamic revolution. I personally know a Persian family, so I'm the first to say that its possible for a person of a traditionally Islamic extremist background to disagree with fundamentalism. Of course, his family lived under the Shah, who was secular, and his upbringing might have effected that.
A good amount of people are against Bush and his polities. But that doesn't mean the American people are jumping to other extreme and deciding that we should just "isolate." I'll make an analogy. Many people were against the Vietnam War, but still supported the Cold War. I'm against the Iraq War, but I still support the War on Terror. Iraq was just a distraction.
Pat Buchanan and Ron Paul wrap their anti-Semitism up as anti-zionism because its more politically correct. I doubt that if Ireland was under attack by Muslim Extremists, PBJ would be advocating "isolationism" for his brethren. However misguided he is on foreign policy, although he is right about the Iraq War, his stances on domestic policy are basically right.