It's going to carry on like this for another few months.
this is what i am afraid of too.
it is not just bitcoin cash chain that they are harming they have caused a lot of problems with bitcoin mining too. and as long as it is alive and as long as its price gets pumped there is the same risk all over again.
I think they've done everyone a favour and exposed a vulnerability in bitcoin. Bitcoin was fine when it was the only sha-256 coin being mined apart from peercoin, and the miners had no choice of what to mine.
Now they have a choice, you can see what happens - which is incidently the same thing that happens in the alt world for scrypt coins, where miners switch what they mine almost daily, only people somehow blanked that experience out, instead of learning from it. Megacoin and Mooncoin used to have this problem and they solved it using a Gravity Well readjustment where the difficulty was adjusted after every block.
Sadly the bitcoin and bitcoincash developers tend not to take any notice of the truly innovative solutions found in the alt space. Perhaps now they will. Because if it's this easy to disrupt bitcoin, any govt or dark actor can do it.