Eh, you don't want the service to attract Jews or what? Star of David is a symbol within the Jewish community. What you are referring to is probably the "Yellow badge" that was used by Nazis for identifying Jews. Two very different things.

Let's not make all Jewish symbols Nazi-related, we have enough of that already.

Also, some soldiers wore the Star of David as a symbol of defiance against antisemitism. So if you see someone wearing that symbol (or using a domain with that symbol), assume they are Jews/supportive of Jews, not that they are Nazis.