myfriend: Why wouldn’t you tell someone to enjoy their holiday?
well minyangal perhaps it is an issur, prohibited by the Torah, which you are commanded by the Creator to follow, sometimes to die for. this is called Halachah.
perhaps it isnt an issur, perhaps it is in some circumstances. it certainly behooves a Jew to investigate these things and not just decide based on what feels good to ones wholly american mind.