You make a good point but you have to remember that Hoffa was nothing more than a thug who thought his mob, the Teamsters, was mightier than the Italian mob and likely felt he was invincible.
Hoffa's mob just busted heads and knees while the mob used guns..........
I'd love to see this mystery come to a TRUTHFUL end and an accurate documentary made out of it.
As for DeNiro starring in a movie about this, forget it..............
I never was under the illusion that Hoffa was not as bad as the rest of them.
Had no idea there was a movie about it or coming out about it or whatever.