Not for the first time, people are talking about a forthcoming sectarian division of Iraq. This is an increasingly good idea, and a sound policy will embrace it and its consequences.
Western societies tend to view pluralism as a good in itself, and the failure of pluralism as a failure of their own basic premises. This is false on two counts: First, social pluralism is not a good in itself, except from an efficiency standpoint, wherein competition of thought and values drives – or at least speeds up – human progress. But this isn’t a moral case per se, and it does not follow that the good derived from the coexistence of many elements will be derived from the coexistence of all elements. We should have seen by now – even though many of us have not – that some societal elements tend toward the destruction of the very structures and mores that make social pluralism (or the “open society” of Popper, as you prefer) peacefully functional. This leads us to the second count on which the traditional Western view of pluralism is false: the West itself is not a mere agora, nor a set of morally-neutral social mechanisms, but a society with its own definitive values that need defense, and will be eroded from within if and when hostile elements take their place in its forum.