I find this tiresome. You don't need to apologize for acquaintances, or for the hidden personal lives of people you have impersonal business transactions with. Guilt is not spread by touch.
My guess is that you have shaken hands, at least once in your life, with someone who (unbeknownst to you) is a truly horrible person. It's life.
My guess is that you have shaken hands, at least once in your life, with someone who (unbeknownst to you) is a truly horrible person. It's life.