How are they different? Slavery was responsible for millions of deaths too. Is it better because we spread ours out over a much longer time period? lol??? Also it's not like German soldiers were fighting to preserve concentration camps and poo anymore than Confederate soldiers fought to preserve slavery. Invading Poland was literally about getting territory back they lost after WWI in what most Germans felt was an unfair armistice deal imposed by the rest of Europe, since Germany didn't even START WWI.