Perhaps still smarting from the Election Night booing he received for his critical comments of President Trump during the Israeli Film Festival, BlacKkKlansman producer Jason Blum, in a tone of barely controlled ire, briefly summarized how he characterized the message of Spike Lee's acclaimed film about an African-American police officer's infiltration of the Ku Klux Klan. "To me, the message of BlacKkKlansman, which I tell people when they've asked me, is very simple…