Yes, AFAIK it is ABC who is receiving the hash power from bitcoin which resulted into a drop in the overall hash rate of the bitcoin network, though that's not enough to actually point a finger over what happened with the prices recently. Other traders surely have panicked when the price crashed lower than $5800 and everything started to crumble, and no, they might not have known about the drama between ABC and SV so it's somewhat wrong to assert that everything that's happening is solely the cause the petty drama between CSW and Roger Ver.
I was also the impression that Antpool and Bitcoin.com have re-routed their hash power from Bitcoin to Bitcoin Cash ABC that's why they have reported that they're winning the war against Bitcoin Cash SV.
After what's been said and done, those mining pools will go back to Bitcoin because its where the money is. Once this war is over, and it looks like CSW's SV is losing the battle its just a matter of time when he realize that the fight is just useless to begin with.