What is the main idea?

The Diary of a Young Girl by Anne Frank details approximately two years of the life a Jewish teenager during World War II. During much of the time period covered by her journal, Anne and her family are in hiding in an attempt to escape Hitler’s anti-Jewish laws and genocidal desires. Anne’s diary ends abruptly in August, 1944. On that day, she and her family are taken into custody by the Germans and transported to concentration camps.