Many folk who have experienced a trauma develop emotional triggers that can be set off by apparently innocuous events. This is perfectly understandable. I have a few of my own.
Usually, when someone is triggered others display some degree of empathy or sympathy to that person and make some allowances for the response. Usually, the party or event that inadvertently caused the trigger is not considered blameworthy because there is usually no reason for them to think their action could be harmful..
So how come, no matter whether I’m the trigger or the triggered, I’m an arsehole and the other party is the victim. How does that work?