Red Dead Redemption Troubles

I own and yet have never beaten the game Red Dead Redemption.  Mostly because my game has a problem in that John Marsden will pull out his guns whether I want him to or not.  I thought at first it was the controller but switching between the two I own did nothing to solve it.  This would cause problems because John Marsden would say, finish playing poker having lost all his money and then pull out his guns.  Everyone would freak out and start running and I would attract negative lawful attention.  A posse would be rounded up and I would be jailed or shot at.  I would try and put the guns away and be like "No, guys, it's cool, it's cool!" and then John would just pull them right back out.  Recently, I've decided to pick the game back up.  I'm going to roleplay that John Marsden just has this hidden rage problem that causes him to threaten people at random.  I'll see how far I get in the game and report back.