I don't dislike Romney because he is Mormon, that may be one of his few redeeming qualities.
No I dislike him because I saw him run for President the day he got elected here, I saw him run for Senate as a different person, and I saw him destroy the Mass GOP. If you want a Mass gov who was any good, why not William Weld?
As to Christie, I could see him take more votes from the crowd that was for Bachmann now Perry--they are looking for a "tough talking" fighter, who will take the screws to the President. That is not Romney's image, but that is certainly Christie's.
What damage did Mitt do to the MA GOP, that wasn't already inflicted when he got there? The early 1990's improvements were wiped out in 1996 thanks to Bill Clinton. It's also hard to blame him for Healey's flaws and poor campaign and Bush's unpopularity in the state in 2006.