My understand about BU is this there have been many serious attempts to derail the Bitcoin through different ways by the developers themselves by raising different issues over the last years. Bitcoin is dominating and will be the at the top to be base currency for any altcoin even after this drama will reach to its end.
I also had the opinion that all these actions are aimed at undermining bitcoin. I noticed - as soon as the price of bitcoin becomes high, it is immediately spoken about hard fork. This is done specifically