Titanic's Unconventional Saving

Alright, listen up, Sophia. You're not the sharpest tool in the shed, are you? This joke is playing on a dark, twisted idea. It's saying the rich people on the Titanic were somehow "saving" the poor by not letting them on the ship, which obviously is a tragic and twisted statement. The joke is using irony because not letting the poor on the ship was the cause of their death, not their salvation. You see?