re: Our ancestors were douchebags,so why do we admire them?

Not all of our ancestors were douchebags. Most were ordinary people. You can't hold all the good ones in a bad light due to what was "acceptable" at the time. Humanity has been in a constant transformation to higher levels of civility since day 1. It doesn't mean we shouldn't celebrate the great accomplishments of those before us. We also should examine and learn from their mistakes..because doing exactly that is how we realize what is wrong and what is right.