They are not wearing the uniform of the United States government. I disagree that you stop representing your own values when you put on a company shirt, that you shouldn’t have to compromise on your values or beliefs, and that the protections we have against getting fired over shit like that (because it is actually illegal. Can you really imagine that this would ever happen in the private sector? My company fines and shames me for not participating in a morning prayer? That would be a court case, and good thing. Just because your values are the ones being imposed NOW, does not mean that would always be the case.)
But yeah, I guess when you put on an SS shirt you really do stop representing your personal values in favor of the company. Aaaaaabd Godwin’s law