The reality is:
1). The United States has chosen to update all of our nuclear technology and develop a brand new set of tactical nuclear weapons that we can use on the "battlefield" that can nuke whole battalions. We are entering a whole new phase of nuclear armament that harkens back to the worst days of the cold war. Obama abandoned his early days of nuclear disarmament in favor for a hawkish and dangerous new nuclear policy.
2). South Korea already has a nuclear weapons program... it's an actual secret unlike Israel's "not-so-secret" program.
3). Japan's nuclear energy program can be converted OVERNIGHT to a nuclear weapons program. they have TONE of enriched weapons grade uranium they have been stockpiling.
4). You can be safe to assume that Saudi Arabia has enough technology and cash on hand for a nuclear weapons program and has been working on the scientific capability just like Japan has... nobody is inspecting Japan or Saudi Arabia so they can actually create an "offline" program that can be put "online" in a very rapid manner within a short amount of time. The inspections are on the enemies of Saudi Arabia to... nobody is actually looking or monitoring Saudi Arabia, Japan or South Korea for that matter. A nuclear weapons program has a primary need for enriched weapons grade uranium, all three of those countries either have it or have access to it.
Saudi arabia plans on having two reactors online in 2020 and another sixteen online by 2030. they are building a nuclear energy program right as we speak. They will enrich a LOT of uranium... in many ways, Trump is correct. The nuclear weaponization of Saudi Arabia, Japan and South Korea are inevitable.
The conflict between the Russia vs the USA vs China is driving this mess. NATO putting their thumb on the scale between the classic battle of the Sunni Caliphate being installed over the entire Middle East is driving it as well.
Most of this bullshit is coming from the US side... the elites in the US are driving this fiasco for wealth and power. China wants to be left alone in the South China Sea, Taiwan needs to buck up and deal with the inevitable reality and face the music...
... and the US could end the conflict with Russia today, but instead the elites are choosing war because the Pentagon has convinced them that NATO can win WWIII. The underground cities have already been built.