Because they're scare sh!tless that a conservative can't beat Obama, so they are sacrificing their principals to get behind a guy they think can win.
Obama has been tried and found wanting. His support is brittle at best. A good dog-catcher would stand a fairly decent chance of replacing him.
If this were April and Perry had clearly won the nomination over our efforts to get someone better, I wouldn’t be pushing this issue.
It’s too early to settle.
I don’t disagree with your take on things, I just think it’s premature for those who actually buy into that mindset.