He seems to indicate that he has faith that the only way for XT to actually reach 75% consensus if it is truly the best solution. He has complete confidence in the consensus model and I am with him. I don't think 75% consensus will ever arrive at a solution that is bad for bitcoin. (this is also why I don't think XT will get 75% consensus, I am hoping for a block size increase on Core)
Dress it up any way you like. It is a 51% attack and this is how you do it - not with huge investments in hardware of your own to out hash the existing network. But with propaganda and your own client to sway existing miners.
It needs to happen if only to wake up developers that are in denial that it is actually possible. It reminds me of that
XKCD cartoon,