My original analogy was a neo-nazi who is not asking for anything racist but the Jewish baker knows he's a nazi.
Then yes I beleive that is discrimination, if there isn't anything out of the ordinary and it's simply an exchange of cake for money then I see no issue. I disagree with it to be honest, but if you allow it, it opens a slippery slope where people can discriminate based on all kinds of feelings.
As someone who runs a small business (not the same, medicine) it's bad business sense as well, keeping business business is the best solution. The other thing that erks me is that these are people to, they are hurt, sad and have a hard enough life as it is without being chastized because they simply want a fucking cake, what is wrong with people?
Probably ruined these people week, month etc over nothing. Time to evolve people, gays are ok, there is no rational argument against gayness as it stands today.