We're not talking about a simple differing opinion, but about a specific insult with some purpose (what purpose?). And when a person's ideals are simply insulted (how many times have I said this word?), why shouldn't they respond in kind? By showing the same disrespect...

But why sink to the same level? If it's someone towards whom you have an indifferent or negative attitude, are their remarks worthy of any response? Because often, that's exactly what the provocation is aimed at.

Initially, you should respect everyone's opinion, but you should only value and consider the opinions of friends, acquaintances, etc.
This doesn't mean you should ignore all strangers, but you also shouldn't take their unpleasant remarks too personally.

So what's the point of "getting into it" if it will only lead to resistance? And equal resistance at that. What's the point of butting heads when you can simply not do it on either side?

Still, people are different. Some consider themselves superior to others, and they are eager to "prove" their superiority.

Overall, it's a somewhat nonsensical topic.
The initial point is irrelevant.