I think that’s the issue people mix up. He isn’t refusing to do business with anyone because of who they are. He’s refusing to create certain expressions which I should think he has every right to do.

I would expect a Christian cake maker would not agree to accept my money to design a cake that worships satan for example. Likewise I wouldn’t expect a satanic cake maker to make a cake celebrating Jesus.

Would it be right to force an Islamic cake maker to make a cake featuring Muhammad’s likeness?

No he is refusing to make a cake for a gay couple

If he refused to provide groom&groom wedding toppers I'd fully support him but this is food not speech

Likewise I wouldn't expect him to write messages or make decorations he disagreed with

But in this case it's a simple case of discrimination

Literally in the article it says he offered to make them other items... https://www.cnn.com/2018/06/04/politics/masterpiece-colorado...

And literally the Supreme Court decisions stated that he objected to making cakes for gay couples on two separate grounds. To the extent that he may have offered them to make other items, it wasn't part of the basis for the decision, which was entirely about religious animus shown by the Colorado State commission that enforced the law in his case, and not at all about him not actually discriminating because he was willing to do business with gay couples, just not to make the specific cake they wanted.

The fact that something is mentioned in a news article about a court case doesn't mean that (even if it is true) it is part of the basis for the decision. If you want to understand the basis for a court decision, it's best to read the decision itself.

His cakes are food

This seems like a giant loophole to negate anti-discrimination laws.

Are subway "sandwich artists" able to discriminate in their art?

AWS isn't like a supermarket. Depending on the context it's better analogised to something like a car rental chain or a large shopping centre. They're providing ongoing, rented, commodity infrastructure that is subject to acceptable use policies.