A week into the Muslim holy month of Ramadan, a flashpoint Jerusalem site is seeing nightly confrontations between Palestinians and Israeli police that have raised concern about a repeat of the violence that erupted last year. The amphitheatre-style plaza outside the Old City's Damascus Gate is a popular spot for Palestinians to meet after breaking their daily holiday fast. Vendors roll carts of snacks and juice into the square. Palestinian youth at times perform acrobatics to cheers from the crowd. But tensions are again high in the city holy to Christians, Jews and Muslims. Israel has deployed extra security forces…