"Waiving a loaded rifle with your finger on the trigger is... dumb-assery!" - I can agree with that, but...
1. His finger is nowhere near the trigger. His right hand is on the front handguard and his left hand is up in the air.
2. You can't tell in that picture if the rifle is loaded or not. The individual in the foreground of the picture is holding up his hand, blocking the view of the magazine well.
Nice try genius.