charlie, if he is a Jew then you defend him until you personally have enough knowledge to know otherwise. And as most court cases go, that may never be your priviledge. It may be murder, but it also may not be for me to make that call.
regarding the rest of your post, you missed the boat big time. You are correct in theory but if you are going to withhold gunfire until you can see their vest and get a good read on the upc sticker, experience has proved time and again that you will be endangering lives.