I'd bet a bazillion dollars giving a bazillion to 1 odds villain had a set. The fold is not an issue, it is almost certainly correct. The number of players, even in the main event, that will stack off for 30k given that action with less than J5 is close to 0.
The raise to 13k is the issue. Its a tough spot, but I think given your reads / age of players in a 6-way raised dry pot folding to a 2k bet and 6k raise ahead of you seems correct. Raising to 13k and folding to a shove is an elaborate bluff with J5 blockers lol.
