Those cases are talking about discrimination by the Government. There is currently no federal law banning private employers from discriminating in hiring based on sexual orientation. (A bill to change that is currently before the Senate, and may even pass, but is going nowhere in the House of Representatives.)
Yes there is. Civil rights law
of 1964.
Those were the opinions cited by the judge forcing the bakers to make a gay wedding cake even though Colorado prohibits same-sex marriage.