Umm - Israeli troops are in Palestine - that's the problem.

When the U.N. does "peace-keeping" ala Bosnia and Lebanon, they get it done pretty well. Maybe not enough, but if the U.N. decided to go into Sudan, it would get individual soldiers from different counties to be part of its police force. The problem is that the U.N. usually only goes into countries that have no recognized government. Unfortinately, Sudan still has a governmental structure, as far as I know.