My grandfather, who fought in the First World War, was very racist. Absolutely everyone was then. That's why it's stupid to try to apply our values to them. As Bill Mahar said, you aren't better, you were just born later. Future generations will be appalled by you too. They'll probably be disgusted you continued to build pipelines and to drive cars and to use single-use plastics well after you knew it was destroying the livability of the planet, among other things we would totally disagree with or just find inconceivable.