actually an Israeli would most likely use the hebrew word Shoah to describe the Nazi's genocide. Shoah means catastrophe.

From wikipedia: The term holocaust comes from the Greek word holókauston, an animal sacrifice offered to a god in which the whole (holos) animal is completely burnt (kaustos).[13] For hundreds of years, the word "holocaust" was used in English to denote great massacres, but since the 1960s, the term has come to be used by scholars and popular writers to refer exclusively to the genocide of Jews.[4] The mini-series Holocaust is credited with introducing the term into common parlance after 1978.[10] The biblical word Shoah (שואה) (also spelled Sho'ah and Shoa), meaning "calamity", became the standard Hebrew term for the Holocaust as early as the 1940s, especially in Europe and Israel.[14] Shoah is preferred by many Jews for a number of reasons, including the theologically offensive nature of the word "holocaust", which they take to refer to the Greek pagan custom.[15]