I am surprised to hear that laws and ethics have nothing to do with each other. Is it a random chance that murder is illegal and unethical just about everywher

I am surprised to hear that laws and ethics have nothing to do with each other. Is it a random chance that murder is illegal and unethical just about everywhere? Really I was just wondering if you have any examples of legal but unethical employers that you believe it's okay for a university to cite to discriminate against an applicant, in your home country. Perhaps the military?