Of course they will attack BCH and never stop because they have no control over it...it hurts their products that are leeching of an old btc chain..
They thought if they controlled btc git they could rule Bitcoin....they did not want to control an old fork....Bitcoin Cash weakens them.
They knew years ago a rebellion like BCH will split, that's why they set up the "Satoshi's Vision" operation as early as Blockstream.