No, that's not all she said. If that was all she'd said, this Boston Phoenix article would never have been written. Invoking the Holocaust, and comparing it to whatever issue one is speaking about at the moment, is inflammatory, unlike you are speaking of something genuinely comparable, such as Pol Pot's slaughter of half the population of Cambodia.
The intent of the remark was clearly limited in scope to the for-it-or-against-it nature of both issues. Even if you extend it to meaning that opposing same sex marriage is as important as opposing Hitler it isn't offensive.
Someone who takes it as meaning gay activists are brownshirts is just looking for something to feel offended about IMHO. Just because the BP wrote it doesn't mean they had a valid reason for writing it. They clearly have an agenda hostile to the RNC and I don't doubt that has more to do with the article than the actual words SD used.