I suspect they would like to get all the "colors" out.
We're all one book now.

I have no idea about the particular individual in question, he's probably a great guy and retired for personal reasons, not political, but:

Going forward, anybody who exhibits a "partisan" mindset is probably not going to be chosen for supervisory positions.

That goes for red/green partisans or north/south partisans.

We've merged. All those old arguments are now historical relics.
Its pointless to continue the sectarian bickering.