Israel’s defense minister, Yoav Gallant, and the U.S. defense secretary, Lloyd J. Austin III, met at the Pentagon on Tuesday to discuss the rapidly deteriorating humanitarian conditions in Gaza. Mr. Gallant stressed what he said was the urgent need to destroy Hamas, secure the release of Israelis taken hostage in the Israeli-led Oct. 7 attacks. The Israeli minister said he and Mr. Austin talked about the urgency of efforts to recover more than 100 hostages still held by Hama