Jim's not the kind of man to leave anyone behind, not the kind of man to lead from the safety of the back lines. Definitely not the sort to put his own safety above another's, especially not so many. Felix knows more than most about Jim's past, more than anyone else save for his other self. So he should know why Jim's upset.

Hell, he's told Felix about Altamid even more recently.

"This isn't...how could you leave them behind? If you were going to--if you were going to get yourself to safety, you could have." Why did he take Jim? But Jim knows the answer. Because if he could save only one person, it would have been Felix. It doesn't make the knowledge that Isidor and his friends and all the other people they were protecting are back there suffering while he's warm and safe back aboard his ship.

"Fuck...!"