Complex sentence: Gross estimates that approximately 250,000 Polish Jews returned home at the end of the wchapter "The Unwelcoming of Jewish Survivors," Gross describes how returning Polish Jews were subjected to a wave of violence and hostility, with up to 1500 murdered either individually or in pogroms.
Split into simpler sentences: Gross estimates that approximately 250,000 Polish Jews returned home at the end of the war. In his chapter "The Unwelcoming of Jewish Survivors," Gross describes how returning Polish Jews were subjected to a wave of violence and hostility, with up to 1500 murdered either individually or in pogroms.