In 2018 the Supreme Court decided the case Masterpiece Cakeshop v. Colorado Civil Rights Commission case in favor of the cakeshop, which had originally refused to bake a wedding cake for a gay couple. The couple sue the cakeshop, claiming illegal discrimination (in Colorado) but the cakeshop won the case not because of its merits, but because US Supreme Court ruled that the members of the Colorado Civil Rights Commission were biased... against Christians.
Don’t forget to take into account that religious liberty is a real thing in the US... literally the first thing spelled out in the Bill of Rights. That’s why the court considered the state commission’s bias against the religious person’s exercise of their sincerely held belief. Plus, you know, the whole “state can’t compel speech” thing (also part of the Bill of Rights) kind of makes the resulting decision pretty unsurprising.
They are referring to the supreme court case revolving around a bakery in Colorado who refused to make a wedding cake if it was going to be served at a gay wedding.