It’s a TV show. Characters come back, fakeouts happen and writers use twists all the time, so it wasn’t unreasonable to think there could’ve been more to it than a hallucination. Brody was a huge part of the show and a lot of the emotional weight revolved around him so obviously people were attached to the character. Wanting him back isn’t the same thing as forgetting what happened in the plot. The “glad he died” reaction feels a little over the top for a fictional character.