Robert De Niro called Donald Trump “stupid” at the Cannes Film Festival while discussing his character in Killers Of The Flower Moon.The actor, who plays twisted cattleman William Hale in Martin Scorsese’s western crime drama, compared his character to the former US president during a press conference at the festival.“I don’t understand a lot about my character,” De Niro said (via Variety). “Part of him is sincere. The other part, where he’s betraying [the Osage people], there’s a feeling of entitlement.