I don't think a little reminder of the wicked and horrifying things our ancestors did hundreds of years ago is a bad thing...history has a tendency to repeat itself, so by not forgetting the bad parts is a great way of preventing them from ever happening again.
Also, I've seen you use the argument about how the movie is about a fictional African nation based on a comic book a lot. While this is true, I want to remind you that the MCU has always been presented as somewhat of an alternate reality to our own universe/history. Captain America: The First Avenger focuses heavily on World War II, but I don't see you complaining about how you don't want to be reminded of that...
Also, I've seen you use the argument about how the movie is about a fictional African nation based on a comic book a lot. While this is true, I want to remind you that the MCU has always been presented as somewhat of an alternate reality to our own universe/history. Captain America: The First Avenger focuses heavily on World War II, but I don't see you complaining about how you don't want to be reminded of that...