A) they didn't say they were too busy, they said they could bake the cake until they found out the couple was gay. They chose to openly discriminate, which was stupid and illegal, and they got what they deserved. However, if they HAD said they were too busy, but they only said that to the gays, that would also be illegal and they would get what they deserve for violating the law. This is super easy to understand, all the way around. 

B) if they only tell gay people they can't have figurines, that is discriminatory and illegal. They should tell EVERYONE they can't have figurines, then they'd be OK. But that's not what they did, so they got what they deserved. 

You think that pointing out that white people have enjoyed a long period of benefit from subjugating other races and nationalities is racist? Ooooookay then.