I am a librarian/archivist and specialize in 20th century history. Attitudes and choices of the past when viewed with the understanding of the present will feel uncomfortable.
This doesn't mean we quit studying history.
Learning from the past will make us better people if we allow it. We can recognize prejudice and racism, and determine that we will act differently. We can by example teach our children and grandchildren, neighbors and friends.
Studying history is not the same as celebrating the ugly parts; it is seeing in context why.
We are human and we will make mistakes and bad choices. Future historians will critique our choices.
Let's make it hard on them, though, by being as kind, inclusive, and unselfish as we can possibly be.
Go out there and do good things today.