Sure the UN should get into Sudan. The big question, as it was in Iraq, is: what happens if the UN refuses? Does someone(US or whoever) go in alone? This is perceived as immoral by a lot of people, but letting millions die is not that moral either.
    And,on the initial question, yes there is an element of hypocrisy in the selective indignation of devoting pages of self-righteous anger to one set of abuses, while happily ignoring a much larger set of abuses somewhere else.