You are absolutely right, all the altcoin need to follow the trend of BTC, including Bitcoin cash.
BCash is the same other altcoin and the BCash supporter should not try to blaim BTC.
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.