The main problem here is he jumps to a bunch of wrong conclusions and aggravates that with his tone.

And even after being shown an excessive amount of deference (even when he is wrong) he only tacitly admits his mistake and he's still grumbling about and focusing on the areas he still disagrees with.

If he admitted he was wrong with the same tone he concluded he was right, there wouldn't be an issue.

It's the one sided nature of his communication that's unhelpful.