I don't believe Segwit2x is an "attack". It was, at first, an intent of a compromise. And the NYA folks most are businesses that very probably want to move Bitcoin forward - payment processors, wallet services etc. - and I think the reason they signed the NYA is that most of them (except miners/pools) would benefit from low transaction fees.
But I think that regarding the latest news, the most pragmatic stance is to
support the Core/1MB chain while being careful with the private keys and treating the 2X chain as an altcoin.
Only if the Core chain really is attacked (double spending/51%) it is likely to succeed, and that would harm the whole ecosystem (and you should get out for a whole while of all the cryptocurrency stuff if you aren't a die-hard fan/hodler). According to the latest news a Segwit2x victory has a very low probability if even Coinbase doesn't use the BTC symbol for it.
Garzik's ICO may be another indication that he's not full-time dedicated to 2x and a loss of the Core manpower would be very problematic.
You have ignored the deliberate non implementation of replay attack. Do these guys realise that they are fucking with other peoples money. And this is not an attack!!?
Jeff Garzik: Today, bitcoin faces existential threats from forks, developer drama and so on. Knowing what we know and having a clean sheet of paper, we asked what would we build and the answer is this.
Some one please remind him he is criticising the drama he has created and shilling his new ico. Yeah, "probably want to move Bitcoin forward" - Garzik will laughing to the banks reading such shit.