Even if Paul "wins" the Iowa caucuses with less than a quarter of the vote, that doesn't mean the GOP is self-destructing. There is no way he will win the nomination with his wacko neo-isolationist foreign policy.
The self destruction of the GOP doesn’t have anything to do with whether Ron Paul wins or not. It has to do with the desperate GOP attempt to eliminate the symptom while clinging to the disease.
The current tactic is only helping Ron Paul and Obama by extension.
Not so much neo-isolationist as pseudo-constitutionalist (and in that regard, not just his foreign policy).