Lieberman has lost the war of derogatory comparison. Nazi is not the power word. Islamic fascist has better rhythm and is more adaptable to street chant.
Not in a region where there is a heavy Jewish population...like say Connecticut.
While I agree with you, I don't think Lieberman can be the first to use it effectively. CAIR and their terrorist associates will hammer him, accusing him of being anti-Muslim...and get away with it.
The first to use it is going to take a lot of heat. I think there's another FR thread reporting that Bush used the phrase -- I think he's the only one who could and not suffer politically. Once it's out there in the public, we'll hear more of it.