Nick Cannon is ripping the Brooklyn Nets for "dehumanizing" Kyrie Irving with a list of demands that must be completed before he can return ... comparing the team to a master attempting to break a slave.

Cannon defended Irving during a conversation with Anti-Defamation League CEO Jonathan Greenblatt this week ... saying, "I can wholeheartedly say I know Kyrie Irving is not antisemitic."

Greenblatt says he took serious issue with Irving sharing a film that questioned the legitimacy of the Holocaust ... which he explained is dehumanizing to Jewish people.

Cannon says it goes both ways, though ... claiming the conditions of Irving's suspension -- including meeting with Jewish leaders and completing training -- is similar to "buck-breaking."