He is nowhere near flying off the handle here. You should take a step back and reexamine how you view communication from others and where you set expectations of thought process and culture matching your own.
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.
"Oh, I'm _soo_ special and pretty and such a delicate flower, that I want to flush the L1D on every task switch"
Is completely inappropriate. If you feel like that is somehow appropriate in a review then it is you who need to "step back and reexamine how you view communication from others and where you set expectations of thought process and culture matching your own".