Malcolm watches television news footage of race riots, including the March 1965 attack on the Edmund Pettus Bridge in Selma, Alabama and the 1967 Newark, New Jersey Riots. Both incidents took place after Malcolm was assassinated in February 1965.
When Malcolm and Betty are in their living room discussing the rumors of Elijah Muhammad's infidelities and the pending lawsuits, the newspaper article quotes Muhammad saying "in denying the charges, Malcolm X instigated the suits in an effort to disgrace him and spoil the Black Muslim Rally". However at this time in the movie, Malcolm still believes all this to still be rumor. Furthermore, the previous scene featured Malcolm at the Black Muslim Rally praising Elijah Muhammad.
When Benjamin leaves the coffee shop after talking to Malcolm X about joining the Brotherhood of Islam, the bodyguard is on his left. When the camera angle is changed toward the front door, the same bodyguard is on his right.
In the "Russian Roulette" sequence, when Malcolm holds the gun to Rudy's face, the bullet is in the chamber to the right, which Malcolm had just "fired" at his own head. Since the gun didn't fire, the chamber should've been empty.
When Malcolm goes on his hajj, he supposedly lands in Saudi Arabia, which is where Mecca is located. However, he takes a side trip to see the Pyramids and the Sphinx which are in Egypt, with no indication of separate travel back and forth other than camels. The distance between Mecca and Giza is roughly 800 miles.
Malcolm and the other train porters and servers listen to the Joe Louis vs. Billy Cohn fight. Their first fight was June 18, 1941, when Malcolm was 16 and not working for the New Haven Railroad. Their second fight was in 1946, after Malcolm had left the railroad.
In the "Russian Roulette" sequence, when Malcolm holds the bullet in his mouth you can see that the primer is dented and has already been struck by the pistol hammer/firing pin meaning that the bullet has already been fired. It can also be seen in the next scene when he drops the bullet into the cylinder of the revolver.