Zo, Herr Foer, would a minyan of only Jews wearing their new badges of office stand in the synagogues' doorways to deny entry "those Jews"?
And of course, for purposes of identification, "those Jews" should wear, a yellow Star of David? And maybe even require the same at their homes and businesses as well, lest someone unwittingly engages in discussion or commerce with "those Jews"?
Herr Foer there is a distinct ancient and evil smell coming from you, we know it well.