The U.N.’s controversial agency for Palestinian refugees is making a remarkable, if not unprecedented, attempt to censor an Israeli journalist.

On Thursday, Almog Boker with Israel’s Channel 13 posted a remarkable report to social media: “One of the abductees, held for nearly 50 days in an attic, reveals he was held by a UNRA teacher — a father of ten children.” (Boker was referring to UNRWA, the U.N. Relief and Works Agency for Palestinian Refugees that critics say has enabled Hamas terrorism and even hosted rocket-launch sites.) The hostage, he added, was locked up, malnourished, and not given proper medical care. ...