" Giuliani also flourished a glowing letter of support from the relatives of Leon Klinghoffer, a New Yorker whose murder 10 years ago was blamed on a PLO offshoot. "I find the views of the two Klinghoffer children more similar to my own, and I think the State Department here is being very, very defensive," Giuliani said. And he scheduled an appearance this morning at a breakfast for the United Jewish Federation of New York. As the political contretemps continued, at least one etiquette expert chided Giuliani for being a poor host. When confronted with an unexpected guest, one should simply grin and bear it, said Sara Gorfinkle, an instructor at the New School for Social Research. "Arafat showed the better manners by leaving when he was requested to leave and not making any kind of scene," she said.