However, who would create the attack? Developers from another platform? Holders of Ethereum? In any case, I speculate that this is the beginning of the blockchain wars hehehe.
an interesting thought for sure but i don't think this is the case. usually every altcoin is competing with bitcoin. they even spam attacked bitcoin during 2017 though multiple campaigns that were mainly funded by these altcoins such as ethereum, ripple and dash as their biggest contributors.
there isn't that much competition between altcoins! they are all pump and dumps that get their own moment in the sun when the pumpers decide to pump them.