When you have a CEO who openly believes that a class of people (whether that's gays, women, hispanics, etc.) are inherently "bad people", there's cause for concern about how that might affect the running of a large organization (whose employees are bound to include people openly belonging to that group). His stance and position alone could be enough to alienate potential talent. Nobody can say he's "guilty of adversely affecting Mozilla" at this point, but the situation does raise those types of questions.