Brian got point, some Core developers dont have social skills and dont want make compromises with substantial part of Bitcoin users and companies. This only result in dividing Bitcoin community, nothing good for Bitcoin.
Bitcoiners should become united and acknowledge that Bitcoin does not mean necessary Core, and while different opinions are welcomed and encouraged to be discused, majority of hashrate decides. This is giving trust to free market principes which are more likely to work than one group of people taking control.
I think some more healthy competition against Core would be welcome
You are confusing "healthy" (ie positive-sum) competition among consensus-critical blockchains with unhealthy zero/negative-sum contention within a single consensus-critical blockchain.
Altcoins are Bitcoin's healthy competition. If Bitcoin isn't competitive we'll use Litecoin, Primecoin, and Monero instead.
Classic and other XT-like governance coup attempts are declarations of a war that only one side can win.
iCEBREAKER is example of user dividing Bitcoiners whenever he can, not because he has different opinion to some others, but because he is not willing to take compromises for the overal good to keep unity of Bitcoiners.