The problem is that the ball never stops rolling. "Indigenous Peoples" were murdering, torturing, raping, ethnically cleansing, slaving, practicing human sacrifice, and (in some rarer cases) practicing cannibalization loooong before Columbus showed up, so why are we now celebrating that barbaric behavior? Columbus may have been a bad guy, but replacing Columbus Day with Indigenous Peoples Day is little more than low-grade ignorant pandering.
If you want to (*asterisk) history, look up and see how real the myth of the "peaceful, pensive and wholly in touch with nature Native American" is. Its a troupe that came up out of Disney/westerns in the 1930-1950s, and its utterly detached from reality and history.