ok, now it looks clear...
ok, first of all, the issue is arab construction workers who work at rebuilding the Knesset, the Israeli parlament, probably the number 1 site that needs strict security... It has already been proven that israeli arabs help palestinian bombers in reaching their goals when on a suicide mission.
I think it is very democratic of Israel to let arab workers work in the Knesset...
can you imagine jewish people building a palestinian authority building?