Jihan said "he will activate BU if it reaches 51%"
Is he really so desperate to achieve his centralized blockchain but if he activates it that would be bad for bitcoin and maybe it will turn all against him. If some miners change their minds again and those that is undecided chose Segwit instead, this is just complete chaos.
LOL..how does one "activate" BU??? They are already running the client if that's what you mean.
Bigger blocks can be mined at any moment, and big blockers could destroy the SegWit chain in hours, not days. So don't worry about a forked chain because BitFury isn't going to sit there trying to mine 1MB blocks at the same difficulty while over 50% of hashing power is carrying on as normal. Even if SegWitters end up with 40%, that means blocks would take over 20 mins on average. You'd have more than twice as many transactions for the same 1MB block. Unconfirmed TXs would spiral out of control and the price of "Core coins" would tank immediately. And that situation assumes that none of the majority miners don't attack the SegWit chain. You guys are in a lose-lose situation.
Understand that the ONLY reason big blocks aren't being mined yet is because they are giving users time to figure out what's going on and pick new clients to accept bigger blocks.