Where's the mention of the republican leadership here? Do they have any? Who were all these thin-skinned republicans whining to? Did anyone step up and tell them to quit being pouty little children and step up to do the deed? No. Of course not. A few words from Pelosi - and not even very partisan words at that - and suddenly all principal goes out the window. You are beyond naive if you really think that these republicans were swayed by a few words from Pelosi.
It was a Bush-Obama initiative, the Democrats control the House. They can pass it without a single Republican vote. I imagine the Republican leadership wasn't particularly motivated to go along with Pelosi.