Well i think you might be looking at it. Barney held the company line in this response which was submitted on May 23.
Since he was no longer working at UM or with their lawyers, I would there is a strong chance he didn't see UM's response until it came out a couple days ago..
Thus why he felt so mad that he got betrayed as the single problem and all blame on him.

Who knows what he is going to do now... but we now see what he was willing to do.. Sing the company song and go along...
Will that change now? Welll... they ebtter hope they can back the $$$ truck up and quiet him down.