Why Republicans want Hillary Clinton to get the nomination:
It's not because they think they can beat her in the general. She'd win. It's because voters will be somewhat uncomfortable voting for her (30 years of Bush/Clinton, "legacy", mischievous Bill in the background, first woman president) and as a result will resort to ticket splitting
to make them feel better about voting for Hillary. Also, they remember the divided years of the 90's positively (for economic reasons), and will incline towards that on election day. Hillary will have negative coattails in 2008. Republicans will be satisfied with that.