This claim of BCash being the original bitcoin is not correct in any way, technically or otherwise, except perhaps to retroactively spin historical facts to suit the bcash self promoting false narrative.

The more accurate historical rendition remains that bcash is and has been a minority attack on our lovey dovey  existing bitcoin; however, we could likely concede that if bcash were to gain network backing in various ways then at that time they could proclaim to be the real bitcoin, but to be honest they have to admit that they started out as a renegade and minority attack on the real bitcoin