Maybe yes maybe not.

If Classic gets 50% of users, and they decide to still roll out the hardfork, just to prove their point, that would be very bad. And I can imagine them doing that.

But then again what is consensus? If 90% of miners agree, but then later they backstab eachother?

They will fight and bitcoin splits.It will stabilize at 50-50%, that is the equilibrium state.

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So the only way bitcoin will win is to not fight.

Any amount of fighting will only destabilize bitcoin.