if the 1st amendment is only to protect the government from discriminating against religion, then why is it that with every company out there, there is always the disclaimer or, "we are an equal opportunity employer and we do not discriminate against color, creed, sex, race and or religion"? let a privately owned company tell an applicant or employee that they did not get the job or is laid off, fired or suspended bc they are Christian, muslim, budist, or any other religious affiliated practice, and that person will have a law suite filed and will when before a cat can lick its a$$, with its tail up and tongue out. the 1st amendment is not to protect the people from religious discrimination, from just the government, but protection from any and all religious discrimination. if by signing a contract with any company, private or public, that contract can not say "sorry, we do not want you to use GOD, Alah, Buda" or any other religious figure of worship in any form or fashion of legal mumbo jumbo lingo.
This is simple. Google 1st amendment and read what it says.