An Israeli soldier prays at a staging area outside the northern Gaza Strip, in this July 27, 2014 file photo. Israel's long-running struggle to balance modern standards with Jewish tradition has come to a head in the military, where new orders curtailing beards among soldiers have met protests from some rabbis. (Photo by Amir Cohen/Reuters)





Hasidic Jews from the Breslov sect dance with Israeli soldiers during a visit to support troops, near the border with the Gaza Strip, in this July 15, 2014 file photo. (Photo by Nir Elias/Reuters)





An Israeli soldier prays in front of a tank at a military staging area near the border with the Gaza Strip, in this July 24, 2014 file photo. (Photo by Nir Elias/Reuters)





An Israeli soldier prays during a ceremony marking Memorial Day at the military cemetery on the Mount of Olives in Jerusalem, in this May 5, 2014 file photo. (Photo by Ammar Awad/Reuters)





U.S.-Israeli musicologist David Louis plays a lyre as part of a demonstration of biblical instruments at the Temple Institute in Jerusalem January 25, 2016. Louis is among experts trying to reconstruct the notes to which prayers were chanted at the ancient Jewish temples in the holy city, a liturgical art that skeptics believe is irretrievably lost. (Photo by Ronen Zvulun/Reuters)





U.S.-Israeli musicologist David Louis plays a trumpet as part of a demonstration of biblical instruments at the Temple Institute in Jerusalem January 25, 2016. (Photo by Ronen Zvulun/Reuters)





U.S.-Israeli musicologist David Louis plays a lyre as part of a demonstration of biblical instruments at the Temple Institute in Jerusalem January 25, 2016. (Photo by Ronen Zvulun/Reuters)





U.S.-Israeli musicologist David Louis plays a flute as part of a demonstration of biblical instruments at the Temple Institute in Jerusalem January 25, 2016. (Photo by Ronen Zvulun/Reuters)





In this photo taken Thursday, February 25, 2016, Reform Rabbi Nicole Greninger prays with other American and Israeli Reform rabbis in the Western Wall, the holiest site where Jews can pray in Jerusalem's old city, A recent gathering of American Reform rabbis in Jerusalem was meant to celebrate the small gains the liberal Jewish movement has made in Israel in recent years. But a series of comments by Israeli leaders denigrating the group marred the event, reflecting an awkward relationship that many fear is alienating the world's second-largest Jewish community from Israel. (Photo by Sebastian Scheiner/AP Photo)





In this photo taken Thursday, February 25, 2016, American Reform Rabbi, Zachary Shapiro, center left, and other American and Israeli Reform rabbis pray in the Western Wall, the holiest site where Jews can pray in Jerusalem's old city. (Photo by Sebastian Scheiner/AP Photo)





In this photo taken Thursday, February 25, 2016, American and Israeli Reform rabbis pray in the Western Wall, the holiest site where Jews can pray in Jerusalem's old city. A recent gathering of American Reform rabbis in Jerusalem was meant to celebrate the small gains the liberal Jewish movement has made in Israel in recent years. But a series of comments by Israeli leaders denigrating the group marred the event, reflecting an awkward relationship that many fear is alienating the world's second-largest Jewish community from Israel. (Photo by Sebastian Scheiner/AP Photo)





In this photo taken Thursday, February 25, 2016, Reform Rabbi Nicole Greninger, right, takes a picture of other American and Israeli Reform rabbis as they pray in the Western Wall, the holiest site where Jews can pray in Jerusalem's old city. (Photo by Sebastian Scheiner/AP Photo)