"When the moral facts are obvious, there is no need for philosophy" (Leiter)

So remarked the political philosopher Brian Barry (as quoted here).  This is a view for which, as longtime readers know, I have some sympathy.  Who can doubt, though, that in an era when every dimwit and moral leper has his own blog that there are, in fact, legions ready to "dispute" Barry's example of a case where no philosophy was needed because "the moral facts are obvious," namely, whether the use of nuclear weapons in war could be justified?