Sociopaths don't.
I personally will choke up on hearing the story of Francis Scott Key in the war of 1812, the fate of Admiral Nelson at Trafalgar, the Allies landing at Normandy, Shakespeare's "St Crispin day" speech from Henry V, most tales from the civil war, stories about the days of slavery in the United States, the "Trail of Tears" form US history, the bombings of Hiroshima and Nagasaki...
I could sit here all day listing awful historical events that happened to people I never met at times before I was born that I react emotionally to. I think the real question is why you're so different that you not only don't react this way, but can't even understand people who do.