I appreciate that you took the time to inform OP about other meanings of the symbol. I disapprove of you practically ordering OP to change it or be accused of anti-Semitism.

Not everybody believes in the same imaginary-friend-in-the-sky. Even if you are religious, how do you justify removing this symbol while retaining the Celtic/Egyptian/Greek/Norse holy symbols and religious references that abound in the literature? What if an evil party is conducting a false-flag operation with this symbol? Would you tell OP to remove the image of a crucified man on an inverted cross from their campaign?

Believe what you want, but when you tell other people what they should and should not use in their own campaigns, I think that's a step too far.