fresnelly

I say it was Locke's funeral.

Locke's health is connected to the Island, so his death on the mainland represents a true and final break of that connection. Future Jack desparately wants to re-establish that connection to fix things, so that's why Locke's death is so devestating. The door has been closed for good and the magic is gone. He blames himself for not heeding Locke's warning at the Radio Tower.

Also, Locke is now a rogue lostie and killer with his own agenda, which would explain why nobody would go to his funeral. Furthermore, in the future it appears that Kate and the others have put the island behind them so they would naturally avoid Locke's potent connection.

EDIT:

Perhaps I'm overthinking it. Future Jack wants to go back to the island and Lock didn't want to leave the island but all the others didn't. The rest are avoiding the drunk and and kook so nobody but Jack at Locke's funeral.

It's going to be a long summer.

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Building an artificial intelligence that appreciates Mozart is easy. Building an A.I. that appreciates a theme restaurant is the real challenge - Kit Roebuck - Nine Planets Without Intelligent Life