Wow just days after coindash hack and now this, this is not good for ether as a platform. Ether will surely take a knock on price.
Ethereum has nothing to do with this, but rather the wallet and the way the people that got stolen securised their funds. What you are saying is like if there was one hack on Electrum, not even all the Electrum wallets, Bitcoin would be responsible. In fact he would not be.
There will be no roll-back this time, as Vitalik ironised on this today.