He is completely correct that all of these were erected after the civil war as symbols of white power and segregation. The people they honor are being honored for one reason only, their treasonous rebellion against the nation. Easy call as opposed to the other statues of people who contributed far more to the nation.
And naming military bases after confederate generals is similarly redunkulous.
Link: https://www.mediaite.com/tv/civil-war-documentary-filmmaker-ken-burns-calls-for-confederate-statues-to-be-removed-theyre-an-attempt-to-rewrite-history-by-white-supremacists/