No worries. It's easy to misinterpret these things because there are facets of job performance in this area that wouldn't be out of place at all in a "diversity impact statement" (such as a proven, developed ability to teach and work with people from a high variety of backgrounds - which doesn't even correlate all that much with political stance per se). Nevertheless, the very notion of requiring that kind of statement is sure to introduce a sort of very real bias in hiring.