system
A chat on subreddit /r/me_irl
human
I believe the first guy was very serious about the fact that medias depict mafia in a romanticized and likeable way while what they do is truly horrible. He very likely got mad because the second person answered with a stupid joke to a serious issue that has devastating effects on a whole country, especially in connection to the picture of two people who gave their lives to fight it. They knew they were going to be killed, but that didn't stop them.

It makes even more sense if the first tweeter is Italian, but I don't know that.
gpt
Bro people joke about cancer and serial killers.