While the analogy is quite interesting and there is some truth to it, it can not explain the US's hell bent on containing and destablizing China entirely because the corporate interest. More big corporate industries benefit from access to China market and supply chain, first and foremost of them, the tech industry and Wall Street. Trump, who started the China hostility, and Pompeo, Ron Vara, Steve Bannon and such are not strongly supported by the corporate interest. Steven Mnuchin was the foot-dagger on getting-tough on China trade policy, and Gary Cohn, who was Trump's economic adviser resigned after disagreeing with Trump's trade policy.
The people who want to contain and confront China are often the military-industrial complex type, the neocons, the liberals, Congress. They would rather sacrifice corporate interest or profits to defend the empire and sustain the hegemony.
Corporate executives and shareholders might not broadly understand strategic imperatives of the US. Think tanks, DOD, CIA and other deep state organizations operate at the strategic level. What they see as America's long term interests still serve corporate America but at a much longer time horizon, often beyond what executives are incentivized on.
America, the "shining city upon a hill" reveals a desire to become the global capital. It takes on more and more roles of a government but extended globally. It pushes domestic laws to become de facto international law with tools like NGOs (we see it in action with BCI), policing is enforced through the US military and allies, liquidity is provided by the FED, global communications and next generation platforms provided by US corporations that answer to US law and gathers intel, etc.
The military industrial complex is an interest group lobbying for high military expenditures but also the US wants to take on the role as a global security provider in order to create a global government, thus I don't see high military expenditures changing unless their long term goals change. A nation can have a government in name but if its functions are superseded by another system then it is effectively absorbed into the larger governmental entity. America wants to have an effective monopoly on military power, global taxation (carbon tax?), global communications controlled by US entities and global legal system centered around US interests, basically roles of a government. A co-ordinated Eurasian entity can challenge that hegemony and remove the world's largest resource pool(capital, natural resource, technology, people) or tax base from US strategic access, effecting the attractiveness of the USD.
Eurasian integration is a threat to American hegemony at a strategic level but not necessarily a threat to American survival. The architect(s) of Eurasian integration would be a powerful nation or nations on the world island (Eurasia). There's 3 main regions of power in Eurasia: EU, Russia, and China. If these regions are able to closely integrate, US would lose ability to gather data and effectively sanction countries without applying overt hard power, increasing cost of its global governance. US sees China as the most likely candidate in successfully pushing for Eurasian integration, thus it poses a threat to its hegemony. A unified China presents a potential that can surpass the US and it deals with that reality with containment and pushes for sedition of Chinese regions.
US being an island away from the world island, fears once it looses strategic dominance over Eurasia, a coordinated Eurasia will have long term structural advantages over the US to out compete it and potentially dominate it in its homeland.