Romney did nothing on his own to reduce 2A rights. He simply signed bills that the Massachusetts legislature passed. That was the will of the people of Massachusetts. That's what they wanted.
Because a Governor is not culpable when he refuses to veto a bill he disagrees with? You think Mitt really opposed it, but just signed it because that's what people wanted? Oh, what beneficence!
People sure as hell blame Obama for signing the health care act, even though he simply signed bills that the ... legislature passed. That was the will of the people... that's what they wanted.