If she does lose, they'll blame it all on Christine O'Donnell and the people who supported her and continue with the erroneous claim that she couldn't win to begin with.
Conservatives will make similar claims regarding a congressional race in PA, where they behaved likewise.
Both groups are enemies to the Conservative Cause and the Republican party.
Nonsense. Your sounding kind of paranoid here.
The establishment of any political party wants to win. They naturally tend to gravitate to the known quantity and the people they are most comfortable with, but they will drop allegiances in a heartbeat if they think they can win with another candidate. The Florida establishment was entirely behind Crist too. Rubio proved to be an excellent candidate, it became absolutely clear he was going to win the primary, Crist dropped out, and the entire GOP establishment is now backing Rubio.
Had O'Donnell proved over a long primary campaign to be an excellent campaigner, showed she could survive the scrutiny of the various skeletons that were falling out of her closet (ie, become fully vetted), demonstrated that there was reason to believe she could win statewide, etc - the establishment would have come on board.
As is, Republicans basically have to say they'll support her, but it's kinda hard to get too fired up for a candidate you know simply can't win. I think the disconnect here is that you see Christine as someone who could win a statewide race in Delaware, and I (and most political analysts) just don't. We see her as a sure loser in a state like Delaware. I think it's become pretty clear considering she is down 10-20 in the polls this late in the game that I will be proven quite correct.