At least 70,000 Israeli from all over the country proudly participated in the Flag Parade celebrating Jerusalem’s Day on Sunday night, ignoring Hamas’ threat to attack Israel.

The Jerusalem Day celebrations, marking the victory during the 1967 Six-Day War and the reunification of Israel’s capital, include a parade in which tens of thousands of Israelis march with flags through the city’s center and then through the Old City while entering it through the Damascus Gate.

In one of the most joyful and memorable marches in recent years, families, schools, youth groups and public official...