No, Luke is saying that if chinese miners attack the chain and are successful, then the core chain will need to change PoW (otherwise with a minority of hash power it will take al long time for difficulty to adjust.)
There are three factions here-- Segwit2X and Core, who both want segwit, and Bitmain which does not want segwit and which has threatened a forcible hard fork into a bitcoin that has unlimited block size-- and they are even talking about doing an ICO and things like that:
There are three factions here-- Segwit2X and Core, who both want segwit, and Bitmain which does not want segwit and which has threatened a forcible hard fork into a bitcoin that has unlimited block size-- and they are even talking about doing an ICO and things like that:
https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip14...