... Where and how it that statement limited only to governmental actors...
Where in the Bill of Rights does it say business owners can’t limit free speech?
The NFL sure as heck does when it forbids it’s players from taking a knee? But, they can and they do now.
Every Amendment is a limit on government conduct, not individual conduct or business conduct
Think an employee locker is safe from employer search? Or your personal desk on it’s premises? Or, are they protected by the fourth amendment? No. The employer can go through them with no search warrant.
Remember how Obama bitched about how the Constitution was a document of negative rights, a list of things the Government can’t do?
Yes, the bill of Rights is a list of things government can’t do. The 14th Amendment makes the Bill of Rights applicable to what the states can’t do in addition to what the Feds can’t do. Nothing there to prohibit what individuals or businesses can’t do.
About 10-12 Colonies insisted on the Bill of Rights before they would sign on to the Constitution.