Bar was born in a low-income neighborhood in Safed the eldest of five children of a Moroccan immigrant father and an Ashkenazic mother.

He served in the Israeli Defense Force as an officer in Adjutant Corps and reached the rank of captain in the reserves, later studying at the Hebrew University in Jerusalem.

In 2008 he was accepted to the master's program at the Kennedy School of Government at Harvard University, but passed on the opportunity in order to continue his public service.

In 2003, he was involved in the establishment of the “Young Israeli Forum for Cooperation” (YIFC), an organization whose activity was awarded a special prize by the EU's Minister of Education.

As a result of Defense Minister Amir Peretz's resignation (to join Tzipi Livni's Hatnua party), Bar moved up to sixth place on the list.

[7] Bar was part of a delegation of Israeli politicians who visited Poland at the invitation of the Polish Redemptorist priest Tadeusz Rydzyk in late 2017.

The purpose of the visit was to support Rydzyk's effort to draw greater attention to the Polish Righteous Among the Nations who saved Jews from the Nazis during the Holocaust.

[9] On October 26, 2017, together with Rabbi Dov Lipman (a former Knesset member of the Yesh Atid party) and Israeli Minister of Communications Ayoub Kara, Bar attended a Radio Maryja commemoration ceremony in Torun devoted to the theme of "Remembrance and Hope" and attended by then Polish Prime Minister Beata Szydło.

[10] The event was held in the Chapel of Remembrance, situated in the Temple of Our Lady the Star of New Evangelization and St. John Paul II and was organized by Rydzyk together with Jonny Daniels, the head of the From The Depths foundation.