No, you can't blame Boston for it. This came from AP, as you can see from the links I've posted.
Of course, whether anyone actually edits, or posts articles without using judgment is something else again.
I didn't mean the content, just the headline. Every other one I've seen use the 'Bush Offers Best Wishes for Clinton' headline. The Boston page had it as you posted, 'Audience boos as Bush Offers Best Wishes for Clinton'.
I think someone at the Globe wanted to make sure people noticed that.