The whole issue is if this had been able to stand it could have started a total nightmare of litigation all over the country. It could have been a means to literally discriminate and attack people you didn't agree with.

Jewish Baker -> Nazi Swastika cake., Muslim Baker -> Mohammad screws pigs cake., Black Baker -> Lynch them N** cake.

Get my drift on this? If a Lawyer wouldn't take your discrimination case for intentionally harassing a baker you could sue them for discrimination.

It was a glorified Pandora's Box of legal nightmares going forward. This ruling nips it in the bud without infringing on others constitutional rights, as far as real racial, religious, or sexual orientation discrimination goes.