Famously awful man who nevertheless almost singlehandedly humiliated the German-American Bund and prevented a propaganda subversion of the United States. You can be a shit head AND on the right side of history.
More Jack Warner ADVENTURES: The final film he produced, the bicentennial musical 1776, was a major box office flop. Warner was so mad he went on national television (granting his first and only TV interview) just so he could hijack the mic and deliver an angry rant where he blamed the movie's failure on "pinko commies."
But the actual culprit was one Richard M. Nixon, who had asked Jack to recut the movie and remove any line that was less than 100000% pro-American. The resulting edit (made without the director's consent; he was on vacation at the time) removes the movie's best song along with several important scenes. Critics and audiences hated the incoherent mess that resulted.
These days, the only version of 1776 you can find is the director's cut, which restores all the lost footage. Another victory for pinko commies.