Forgive me, but I don’t believe political affiliation is a protected class–protected classes are the only things people can’t discriminate based on. So like, race, sex, religion are protected, but democrat/republican/green party aren’t protected. Businesses can legally discriminate against non-protected classes. It’s just usually a bad business strategy to turn customers away.
Edit: the second sign is definitely more questionable, as it does specifically discriminate based on beliefs. I was mostly focused on the first sign.