German Colony neighborhood was founded (1873) by the German Protestant community of the Temple (Tempelgesellschaft), which have no connection with the order of the Knights Templar. Their Cemetery started in 1878. The members of this group were expelled by the British authorities in 1948 because some of them were members of the German Nazi Movement.
So this Hexagram seems to belong to an Israeli Christian citizen, which had no connection to either of the above mentioned communities.
Pictures by Racheli Rogel©