A study about what is important to swing voters and conservative base voters isn't offensive. This was not a study about the importance of race, but rather what is important to these two groups of voters. The race finding is only one of the findings of the study, and ironically, despite the study saying this issue isn't important and the press needs to get over it, this article only focuses on the race element.
From one of the pages of the study:
Instead of focusing on these intense ideological divisions, the press and elites continue to look for a racial element that drives these voters’ beliefs – but they need to get over it. Conducted on the heels of Joe Wilson’s incendiary comments at the president’s joint session address, we gave these groups of older, white Republican base voters in Georgia full opportunity to bring race into their discussion – but it did not ever become a central element, and indeed, was almost beside the point.