I addressed that in a sibling comment but to phrase my answer in a different way - your choice is between escalation, de-escalation, or stepping away. Escalation doesn't make anything better apart from providing a moment of catharsis, so if you choose to engage then you could try to understand the other person's point of view and where their unreasonable behaviour comes from. Some people are irredeemably unreasonable; those ones you step away from. Many others however were already feeling unheard and upset before they met you, and they brought that into the conversation.

For an example - if you're familiar with The Expanse (great scifi if you like that sort of thing), then imagine you're a belter living on an asteroid, and for your whole life you've been called a 'skinny' by planet-dwelling types in a derogatory reference to your low-gravity physique, then one day someone calls you that without realising what it means except that's a common nickname for belters. The reasonable response from you would be to politely ask them not to, and explain why. The more likely response is one of anger at the insult, even if the other party intended no such insult. You're behaving in an apparently unreasonable way, but based on a lifetime of experience. The other person could return the hostility, then everyone is unhappy. Or they could respond with compassion, and the outcome would likely be much better for both of you.