OK, so what is your definition of Bitcoin? Whatever the maintainers of the Core github repository jam down your throat?
Are you really unable to grasp this? Bitcoin is Bitcoin, the innovative project that started this entire cryptocurrency sphere. It has been evolving over 8 years and keeps evolving despite regular attacks.
Bitcoin is not Altcoin Cash or any other shitcoin. Bitcoin is not whatever you arbitrarily define it to be.
Bitcoin will scale, adapt and evolve, as it has been doing for 8 years (...). It will also prove its resilience, again and again, attack after attack, as it just did last week-end. BCH was just a reckless and unwise attack, both financially and technically (...). There is only one Bitcoin, and it's called Bitcoin.