On a normal market, when position gets liquidated, stocks gets sold. End of story.
If bitfinex would rollback/freeze trades, isn't that market manipulation? They're interfering with "the free and fair operation of the market"
Since bitfinex promised to compensate lenders in case of losses because of a crash, they should pay them out of their own pocket. Otherwise, they should let the lenders take the risk.
Those waiting at the buy side never did anything wrong, they placed their buy orders, btc get sold, buyers get their btc.
You shouldn't undo what has been sold. Once it's sold, it's sold! If it has to crash to $1, then let it crash.