Israeli authorities on Wednesday said they have given the go-ahead for flag-waving Jewish nationalists to march through the heart of the main Palestinian thoroughfare in Jerusalem’s Old City later this month, in a decision that threatens to re-ignite violence in the holy city. The office of the Internal Security Minister Omer Barlev said the march would take place on May 29 along its “customary route” through Damascus Gate. At a time when Palestinians are being killed and injured daily by Israel, harassed and brutalised as they mourn, barred from flying their flag, the govt approves an ultra n…