I don't agree with you. There is a core of conservative opposition to Giuliani, and their criticisms are perfectly legitimate. I don't expect them to "exit" the party; I expect them to battle for their position. But there is a vocal and repellent angry group whose immature tactics harm their own cause. Since I am rooting for Giuliani, I am thrilled at their increased shrillness and unattractiveness.
Well, the vast majority of social conservatives will eventually support him, but the fringe that won't can and should leave the party.