I'm not sure but its way closer then most people think. I think its a fold to make the most money in the long run.
The fact that he shoves makes your calling range much tigher. When you'd be in the small blind i'd shove AJ, but i'm not calling it off with AJ. Would be tempted and probably call off in a smaller buy in and go for the win. But thats wrong thinking. In general i think you should icm fold here to make the most money in the long run. Aren't there icm calculators that can see if its a call or not? Maybe someone have it and can check it, i wonder what the calling range should be here. Probably the other stacks are also important to know, the pay out structure etc.