Open this photo in gallery: Israeli soldiers during a ground operation in the Gaza Strip, on Nov. 22.Victor R. Caivano/The Associated Press The world changed on Oct. 7, 2023, when Hamas launched a brutal rampage upon Israel that shocked people with its brutality and depravity. Almost as shocking was the realization that many people throughout the globe celebrated the carnage as a first blow in the struggle against what they denounce as “colonization.” This is far less shocking to those of us who study history with a realistic and sanguine view. Periods and incidents of unimaginable brutality are so common…