"The last time athletes have been this outspoken was with Muhammad Ali and Bill Russell. That's the last time probably we've seen this kind of division in the country and with civil rights issues," Golden State Warriors head coach Steve Kerr said in comments published by ESPN Sunday evening. Kerr was weighing in on President Trump's weekend tussles with pro athletes and their political activism — from Trump's decision to rescind the Warriors' championship invitation to visit the White House over comments from point guard Stephen Curry to the president's multi-day attack on NFL players like Colin Kaepernick who kneel during the national anthem in protest of police brutality and racial injustice. But Kerr didn't stop with a history lesson.