All that actually happened here was that a new fork was created based on an earlier state of the ledger and a significant group that includes main devs, miners and investors left to follow that new creation. They were also backed by strong voting majority, but in a very low turnout vote.
What we are seeing is price discovery for ethereum without its previous big investors or devs. They brought ETH over 1 billion in the first place...BUT...the spite money will be hard to predict. There are a lot of rich BTC and other alt coin supporters who are in competition and would like to see the ETH devs and their investors fail.
Nice summary although I don't quite agree with the conspiracy part. ETH devs and investors dug their hole entirely on their own and I doubt someone hates them so much that they would spend millions of dollars to make it fail. Some opportunist pump-n-dumpers might fuel the mayhem but I'm quite certain ETHers are fully capable to self-destruct if they try hard enough.