Even by the standards of a movement that considers Maggie Gallagher an intellectual, assertions that no gay or lesbian could judge a case concerning gay and lesbian equality are mind-blowingly dumb. Not to mention self-refuting; since the PropH8 argument is based on the idea that marriage equality is a threat to heterosexual marriage, it’s not clear who exactly is able to hear these cases, as heterosexual judges should also be required to recuse themselves.
In terms of bad arguments in this area, though, I don’t think it’s possible to top Ed Whelan:
According to his recent disclosure, Walker has been in a relationship with the same man for the past ten years. Walker and his partner evidently live in the San Francisco area.
San Fransisco? Hell, forget recusal, he should be impeached immediately!