He really said that? I'd like to read about that pathetic attempt of his, do you have a link to the story?
Yes. Basically the story begins before May 7, 2019 when Binance gets hacked and more than 7000 bitcoin is stolen in one transaction.
Initially they hide the hack and say it is just "maintenance" but their systems are all shut down and behind the scene they are contacting mining pools to ask them to come together and perform the 51% attack to roll back the blocks so that the incompetent Binance can get its money back.
After they reveal that there was indeed a hack Changpeng Zhao (Binance CEO) in a public forum on May 8 mentions the pursuit and possibility of a "roll back".
Eventually later that day when the story of this outrageous act blows up in their face as pools deny their request and they see the angry community CZ tweets again claiming "after speaking with various parties, the exchange decided not to pursue the rollback approach." trying to hide that they did indeed pursue rollback but they failed to convince anyone to help them and by that time the block containing the transaction was already too deep (200+ blocks) to do anything about it!
You can read some of the story on news sites:
https://thenextweb.com/news/binance-bitcoin-hack-blockchain-reorg-plan-erasehttps://www.coindesk.com/binance-may-consider-bitcoin-rollback-following-40-million-hack