UN Secretary General António Guterres has warned Israel of the consequences of embarking on a major ground offensive in Rafah, the southern Gaza Strip city that is overflowing with more than 1.3 million Palestinians displaced by war. He said that Rafah sits “at the core” of the UN’s humanitarian operations in Gaza and that a large-scale Israeli military operation there would have far-reaching consequences. “An all-out offensive on the city would be devastating for Palestinian civilians who are already on the edge of survival,” he said. “I have repeatedly called for the immediate and unconditio…