You are welcome to have your opinion. But all you’ve done is handwaved away even my first described counter-measure without explaining why it would not work.

If painted into a corner, bitcoiners would defend the network by doing what they can to keep it operational. They are pretty clever and, indeed, cryptography makes things easier to defend than to attack. That’s really the whole point of it.

Your scenarios quickly escalate into the ridiculous. Do you really think America would initiate a nuclear war on other countries to take out Bitcion mining facilities? Would they initiate it against other nuclear powers who could retaliate? It’s one thing to create a petro-dollar and do away with the gold standard through passing a treaty. It’s quite another to start nuclear Armageddon to try to end a bitcoin standard.

I find the paper you cited completely unconvincing. I’m not going to describe all the countermeasures here, but there are easy ones, that have in fact had to be used on other, less secure and buggier blockchains.

Recall that China is powerful, has a lot of mining within its borders and is not a fan of Bitcoin or the US dollar which Bitcoin is helping according to your analysis. Yet it has not banned Bitcoin — although it had tried various things in the past. Why did it abandon its attacks? Until you can answer that question, your over-confident prediction of a successful attack by a state actor on Bitcoin is unconvincing.