This is a good time that showed how the king bitcoin affected all altcoins, so BCash people betraying bitcoin must have taken their lesson: Promote your altcoin, do not badmouth bitcoin, that is what I say. If BTC goes down, your crappy altcoin will go down harder. It is us coiners against the nocoiners and there is no point in fighting for short-term gain.
Bitcoin is like the earth, and the altcoins are like the seeds. If you salt the earth, your seeds will not grow. Bitcoin is the king and everyone has to buy bitcoin to be able to purchase altcoins.
I don't quite agree with your opinion. First, the Bcash fanboys made enough profits from it, there was a reason why the major so called "fanboys" were supporting bcash. It was really a nice way to make up some extra money.
Second, nowadays enough options are there to let people buy altcoins without buying bitcoin in the middle, one of them is through ethereum, another is via direct interactions with people willing to sell crypto for fiat or online modes of payment. Things are not like they used to be in the past.