The honest teaching of communism would certainly have to include the millions that died under Mao, Stalin and Pol Pot. It would also have to mention the communists useful idiots that were murdered once a takeover was finalized.
Murdering of the useful idiots is quite important, because most of our leftists are not true communists, but mentally ill people that simply will not fall into line once the hard core commies take over. They are likely a worse threat than patriots.
Mao and Stalin never tolerated sexual deviance. Homos and trannies will be executed, so will drug addicts.
The young need to be schooled on all of this.
'The Gulag Archipelago' should be required reading for all HS students.