She takes their claims at face value.
My review of The Battle Over Marriage: Gay Rights Activism Through the Media, by Leigh Moscowitz is just out in the Chicago Reader.
An excerpt:
Moscowitz is meticulous in describing her methodology: how she went about her interviews, what questions she asked, what sources she looked at. Ironically, this causes her to miss the forest for the trees—the problem being not that she spoke only to promarriage activists, but that she takes their claims at face value.
You can read it here.