But you know what, it was an irrational idea to begin with.
In Ohio, a bill has been interested by state Republicans to bar homosexuals from adopting children. It's a spectacularly stupid idea--if not outright unconstitutional--and only serves to harm underprivileged children who need a family more than they need to be political playthings.
So, in response, Ohio State Senator Robert Hagen (D) has drafted a counter-bill, to prohibit Republicans from adopting children. Oh the irony. Hagen argues that children in Republican families are at increased risk of "emotional problems, social stigmas, inflated egos, and alarming lack of tolerance for others they deem different than themselves and an air of overconfidence to mask their insecurities." Of course, he admits he has no solid scientific data to back it up--but then, neither do the anti-gay adoption forces, so that washes.
If nothing else, great political theater. Irrational discrimination is irrational discrimination, be it against gays or conservatives.