In the 1930s, during Hitler’s rise to power in Germany, the above photo of a local Brazilian soccer team was taken, and those swastikas on those flags are exactly those kind of swastikas— Nazi swastikas. Because in the 1930s, there were quite a few very fervent supporters of Adolph Hitler and his plans for genocide and world domination. And these Brazilian Nazis weren’t just bad in name only, they also were pretty big slave owners— and the soccer players in the photo were slaves. Stolen from orphanages and forced to work on farms their whole lives.
If any work of sci-fi involving time travel goes on long enough, there’s always the “Let’s travel back and time and kill Hitler” premise. But time and time again, the theory goes, that doing such a thing might seem noble, but might actually be impossible even if time travel were a possible, real thing.
Read more here on the many, many ways science fiction has shown the broad ramifications of trying to kill Hitler with a time machine