Klal Gadol that far too many overlook:
Even in an instance where an action or behavior would otherwise be permitted (which is far from clear in this and many other instances), one must always consider the ever-pertinent, ever-critical question of <i>eivah</i>; will the action or behavior-in-question incite, inflame or exacerbate animosity, resentment or hostility toward Jews? (Whether Jews in general, or any subset).