Against a state like that I’m inclined to agree with you.
They all are like that. There are no exceptions. I truly hope that the pretentious fakery of these (so-called) "liberal democracies" has not lulled you into seeing these entities as something which they are definitely not - place the ruling elites of the most "liberal" state in jeapordy, and it won't take long for them to reveal what they truly are and always have been.
If they truly have no intention of coexisting then obviously the deal would be a trap.
They don't. Let's give one of these "liberal democracies" the benefit of the doubt (rather unrealistic of us, so only for the sake of the argument) Let's say you're dealing with a regime that has a Bernie Sanders at it's head - they offer the deal in good faith, you take it. In four year's time, you are now dealing with a regime headed by a Ronald Reagen - voted in literally because of the "weakness" of the Bernie regime when it comes to dealing with the threat posed by these "anarchist terrorists" - and now suddenly you have well-funded armies of right-wing paramilitaries perpetrating genocide on your enclave while property developers are lining up to sell it's land to the highest bidder. And that's just the start.
Have you never wondered why liberalism is so much more effective at maintaining imperialism than fascism is? That's why - the fascist is our weakest enemy.
Is every person in the world capable of being an anarchist?
That doesn't matter - an anarchist society (or something close enough) doesn't require anarchists. It only requires a society that has normalised said society being run from the bottom up - whether the people in such a society call themselves "anarchists" or not is irrelevant.
There is a crucial difference here they owned the land before.
That, too, is immaterial because the capitalist status quo will see and treat your revolt no differently. If they can isolate you, they can destroy you. If they can dictate what you can do economically, they can destroy you. If they can control you industrially, they can destroy you. If they can hamper you socially and politically, they can destroy you.
I truly wish anarchists would read about warfare with the same enthusiasm they read political theory - for an anarchist, it comes with the territory... figuratively as well as literally.