Interesting...........
Under federal law, aside from workplace complaints, there are few limits on a private employer’s right to terminate a worker over forms of speech, such as participating in a protest.

However, some states and local jurisdictions do offer employees protection from being fired over their lawful, off-duty activities, including political activities.

“It totally varies state by state,” “Most famously, California has an expressed protection of employees’ right to speak on political issues, and limitations on an employer's ability to take action for employees’ off-duty conduct or off-duty political speech.” Cities including New York, San Francisco, and Chicago have adopted their own laws against firing workers over political activities.Government employees, on the other hand, are entitled to broader safeguards under the First Amendment, which protects free speech and the right to assemble.“To the extent to which demonstrating the mall in Washington DC would be constitutionally protected, a state actor or government employer couldn't take any adverse action against an employee for doing that.”

‘You can always be fired for engaging in criminal activity’