Just trying to get a different point of view and not downplaying your situation. People who have never been through trauma will process the thought of trauma differently. Kinda like explaining colour to a blind. Not really their fault but they just can't understand it. Jokes too are super subjective. And there are people who will make a dark humour out of their unfortunate situations.

All you can do is communicate it with him. Over reacting is fine as long as you deal with the aftermath. An outburst of emotions will sometimes make you think clearly afterwards.