That is NOT what George W. Bush is doing. I have seen posters who have done what you are accusing GWB of, and that is not what is happening in this case. His depiction of Reagan and abortion are completely accurate. One might propose some of the arguments you made as reasons for Reagan failing to publicly disclose his change of heart, and additionally that he had no platform from which to do it until he again ran for president in 1975. But the fact remains, he waited until then.
Over the years, I have participated in many discussions about Reagan's mistakes. Like most presidents, even the best of them, he wasn't perfect, he made them. That doesn't mitigate the fact that he was STILL a great president, and will always be at the top of the list of heroes for many conservatives, including me. : )
What happen to fair and balanced?