If the law is unethical then you may be pushed to do "bad" things. For example if you are a Jew living with family in a Nazi Germany and someone know your secret and he feels he need to disclose it to the authorities then you may consider... murdering him. Would you really be a bad guy?

The hypothetical is simply a bob and weave. Hiring a contract killer to execute a business rival is clear and unequivocal.