When does Jason miss an opportunity to blame Bruce? Jason basically thinks Bruce can do anything. He refused to think that Tim might have successfully stalked Batman, obviously Bruce knew and manipulated him, partly because he couldn't admit that Tim might be genuinely better than he himself was (thus justifying his fear that he wasn't good enough to be Robin).
Here he wouldn't bear thinking that Dick might've convinced Bruce to let go of the mission to spend time with family, when his attempt to get Bruce to make the mission less important than Jason ended in exploding buildings and Batman saving Joker's life.