In your defense, you didn't get paid enough, so yes, you betrayed the Arkham Knight and gave B information about his army. To put it simply, Jason found out about your betrayal and... what do you expect? He obviously wants to kill you. "You can't hide from me!" You hear the Arkham Knight yelling, his armors moving and his footsteps getting near. Are you in danger? If you are smart enough and fight correctly, probably not.

Okay, let's be real; you are in danger.