"I wouldn't be so quick to dismiss the reach of white supremacist voices..."
And I wouldn't be so quick to dismiss the very fact these monuments lend to our history. It's very obvious that you have bought into the lib battle cry that they "celebrate pro-slavery" and do your best to claim anyone who doesn't believe as you, 2/3 of Americans to be exact -  as not only racist but white supremacists. Good luck with that. That claim hasn't worked in the U.S. and I suspect won't in Canada, either.