The problem with biographies is that you have to make sure not to put your own beliefs & present them as facts to white-wash a person/organization.
Oppenheimer was a brilliant scientist indeed but he was also a COMMUNIST (there is a ton of evidence/articles about it and he even admitted liking communist ideas and social values, was a member of communist fronts, subscriber to communist magazines, sent them money monthly, his brother, wife, mistress and believe it or not many of his students were also known communists).
He was indeed a security risk and some may go further to say that he committed an act of treason but the film presented a false image of Oppenheimer as the "mistreated scientist" who had to endure great injustice for the higher cause of stopping a nuclear arms race.