Rabbi-dr and Syag, I will defend popa on that. He was only putting down that poster’s knowledge because that poster was taking a very non-traditional approach to halacha, which included disregarding the opinion of, in a demeaning manner, one of our great poskim (the Rema). This was not over some silly grammatical minutiae.
Even if one were to defend that poster’s approach (which I don’t), he would have to admit that the motivations were quite different.
If you want to call popa a hypocrite, you’ll have to find a different example.
Edit: This was posted before popa’s post defending himself was approved.