'Many' are babbling nonsense, then. No serious person - especially geopolitical foes - thought Trump would go nuclear.
They thought he was the kind of guy to bust your nose if you took a swing at the U.S. and would not be intimidated into concessions that a weaker president might. Nor let this country take a backseat to the UN or NATOs interest if it didn't align with ours. That's a downside re: the NATO alliance, what Thatcher phrased as "Consensus is the death of leadership".
That's why Trump worked.