As much as left-wing protesters have to fear Israeli cops, they have to fear even more the Israeli "street" the cops are shielding them from. In his 2004 book The Case for Democracy, Natan Sharansky (with co-author Ron Dermer, head of Bibi Netanyahu's brain trust) popularized his "town square test," which he called the threshold test of whether a society is free or not. It went like this: If a person cannot walk into the middle of the town square and express his or her views without fear of arrest, imprisonment, or physical harm, then that person is living in a…