Halloween (these days) is about whatever costume one wants.Hey dust1n, it's been a while. How's life?
My suggestion is to not do it. The reason is that Halloween costume parties, if I understand it well, are about scary/evil/horror/weird costumes somewhere between the lines. I think getting dressed in Jewish outfit could hurt the feelings of some members of the Jewish community, depending on the understanding of what Halloween stands for.
An Arab traditional outfit with a turban and a broad sword would be a better choice to freak people out. Just make sure of the heavy beard and angry face
Often, they're greatly admired characters.....