Police stopped an unauthorized flag march by right-wing nationalist Israelis planning to trace the walls of Old Town Jerusalem on Wednesday, with Israeli-Palestinian tensions over the city’s holy sites spiking once again. Authorities had prohibited the march for security reasons, and Israeli police halted it with a blockade shortly after it began. Shoving ensued. Ahead of the march, militant Palestinian organizations in the Gaza Strip had issued a sharp warnings they had “their finger on the trigger.” In in the past few days, Israeli security forces have clashed with Palestinians on the Noble …