What else is VJ going to say?  He has to express full support to his starting QB right now.  Unless you are an established QB (Brady, Rodgers, Ryan, Carr etc.), your performance is always evaluated.  If the team loses 2 home games to start the season, the pressure will be on (and every positional player that under performs will be apt to be replaced).
As far as Talib's comment, it is what players do.  Support each other.  This past weekend, one of the local TV Channels had highlights of the 4th preseason game.  At the end of the game, Talib is walking off the field with his arms wrapped around Kyle Sloter...and he is shouting at the cameras joyfully shouting how Sloter is so great and "Sloter is in the house at Mile High".  Words to that effect.  So if Sloter had been chosen as the backup, I am sure Talib would have expressed his complete support for Sloter (as he did for Brock).