Bitcoin Core, Bitcoin Segwit, call it whatever you want, but the fact remains that it is the REAL Bitcoin. The decntralized community of users decided this with UASF and NO2X last year. BCash is a Chinese knock-off scam of the real Bitcoin which attempts to subvert the real Bitcoin and steal its name. Blockstream didn't destroy Bitcoin (which is a fallacy itself), because it was never theirs to destroy, and they have never had the power over Bitcoin that the haters claim.