I think it is likely someone specifically targeted ETC, because of their argument of "The block chain should always be completely immutable". I'm not sure if you're aware of the histroy of ETH/ETC but the short version is someone hacked a smart contract on ETH and stole a lot of money. It was decided that the transactions that stole the money should be reversed, so the people's money can be returned. However, reverting those transactions require a hard fork of the block chain and a number of people argued that the blockchain should be immutable and that the fork was a violation of that. The people who objected and kept the "original" chain are now called ETC, while the other chain is the one now known as ETH.
This leaves ETC in a very difficult position. To reverse the double spent transactions breaks the core tenet on which the ETC chain is founded "the block chain is immutable". If they roll back those transactions, they aren't any different than ETH, just a minority fork with few developers and no differentiation. However if they don't reverse the transactions then the chain is forever comprimised and its highly unlikely anyone will want to use ETC.