It's possible you didn't intend it, but your parent comment definitely came off as snarky, so I don't think you should be surprised that people responded in kind. You're honestly doing it again with the "let's stop feeling attacked" bit; whether you mean it or not, your phrasing comes across as pretty patronizing, and overall combined with the apparent dislike of people disagreeing with you after the snark it comes across as passive-aggressive. In general it's not going to go over well if you dish out criticism but can't take it.

In any case, you quite literally said there was a "lack of schemas", and I disagreed with that characterization. I certainly didn't feel attacked by it; I just didn't think it was the most accurate way to view things from a technical perspective.