Colluding with the miners is not a problem. Some people think it is fine for the "hacker" to take away the money from the DAO by exploiting a bug in the system. It is also fine for miners to get the money back by not exploiting a bug. That is all the 51% attack does. It is in the design of any block chain.
I think the hacker stole by deception and that is certainly theft.
My problem isn't collusion per se, but collusion at the behest of the Foundation. I don't think anybody believes their motives are as pure as the driven snow.
The Foundation members want to make some money out of Ethereum initially. But they did not realise they could have made so much. It was more than $1b.