Agreed, but did the baker treat them badly? Or unfairly? Likely he would refuse anyone who asked them to help them commit a sin. Like I mentioned earlier, if someone asked him to bake a cake for a swingers convention, he would refuse. Now, would you call that discrimination? I mean, you have the freedom and right to swing if you so choose. I wouldn't see anyone making a fuss over that.
I know I know...your next statement is "but that has nothing to do with being gay", well, being gay, and swinging with your buddies wife are both your rights, are they not? Yet, you would only accuse the baker of discrimination because of the gay couple. Why?