I don't know what Bush thinks about how Roberts would rule on Roe or on Gay Rights. Reid clearly thinks Roberts will uphold Roe - and will support a lot of the liberal agenda. The only evidence we have right now is that Roberts was the environmentalists lawyer in an anti-property rights case that Reid loved, and Roberts helped the leftist lawyers in one of the most radical gay-"rights" cases.
what about his work in the Solicitor Generals office and his other writings?
Teh far right was so vocal and so insistent that Bus hwas going to nominate Gonzales. They expected even wanting to be betrayed..they went so far out on a limb that they would look like fools if Bush nominated a conservative. Thus the far right ahs a lot invested in proving that Bush has betrayed them.