To remain pluralistic, a society is forced to deny pluralism to all totalizing ideologies, despite its instinct to extend it.

My claim is that there is no 'paradox' here. This is fundamentally what pluralism means. Extending pluralism to that which seeks to destroy pluralism is not pluralism. It just MEANS "Pluralism for pluralists." It doesn't mean "Dear totalists, let us invite you in to destroy us."