While you may not agree with the tone that Alyaza used in their reply, their response is logically and factually correct and I think it's natural for someone to be upset about someone who's being deceitful with their point (whether it's done consciously or not). Furthermore, jumping into a conversation someone else is having online to call one side pedantic or toxic isn't exactly treating them with good grace or being nice. If you wanted to diffuse, you could have asked questions or treated their response as charitably as possible before jumping to conclusions about intent.

Being nice and being civil are two different things and we do not strive to be perfectly civil around here. After all, weaponizing civility is often used by the intolerant to try and tone police others. While tolerance/intolerance isn't at play here, the same mechanisms of speech are, and its fair to attribute charitability and faith based on the conversation as it unfolds. If someone is deceitful in their response, someone responding to that bad faith with less respect is to be expected.