The folks that are pro-private company censorship always do that. It's the only way their argument works so they have to avoid the nuance that free speech has a law and a principle.
It's constant to read opinions like that in threads like this. We used to have this argument in the 60s where private businesses argued they didn't have to serve blacks since they were a private business. Political speech/activity is protected when it comes to labor law. It's not hard to see the law updated at some figure point. Discrimination is discrimination in my book, and free speech is paramount even the most repugnant opinions.