I wish more schools could have been like yours!! Cab Calloway? Wow.
Then MLK was shot, the likes of Rap Brown and Ralph Abernathy and Eldridge Cleaver and the New Left moved in and hijacked what could truly have been the end of racism in America to turn it into a militant cause for hatred.
We've been going down that road since and it is leading to an ugly place for all. Worse yet, many people who showed promise were derailed by that movement, largely pushed by the Communists of the New Left to disrupt society in the US.
It has worked and continues to do so, just as the hijacked Conservation movement led to the ecowhackos of the current EPA, attacking western industry, much of it started with or infiltrated by Communist interests during the Cold War.