Ethics in the workplace is about your behavior while carrying out your job duties. For instance: lying to a customer to make a sale and hit your quota is unethical.
Politics and ethics can intersect, for instance, if you are writing some graphics software and someone realizes it would make a great missle guidance system. Some people might feel that's perfectly patriotic and be happy to provide it to the DoD; others might never want to work on a weapon. Political opinions lead to divergent ethical codes.
But here with Coinbase it doesn't seem to be an intersection at all. It's unethical regardless of political persuasion.