What's the surprise? He's with the Establishment who've always schemed for a one-world socialist government. Monopoly capitalism and Communism have similar goals: e.g. monopoly control over almost everything. And as Gary Allen has said, the road to world Communism is through world socialism:

https://ia800208.us.archive.org/15/items/TheRockefellerFile/AllenGary-1976TheRockefellerFile.pdf
The Rockefeller File is not fiction. It is a compact, powerful and frightening presentation
of what may be the most important story of our lifetime, the drive of the Rockefellers and
their allies to create a one-world government, combining super-capitalism and
Communism under the same tent, all under their control.

Sutton postulates why wealthy men like the Rockefellers would cooperate with and even
finance the very Communists who are allegedly sworn to bury them.
The British-born scholar points out:
... one barrier to mature understanding of recent history is the notion that all capitalists
are the bitter and unswerving enemies of all Marxists and Socialists. This erroneous idea
originated with Karl Marx and was undoubtedly useful to his purposes. In fact, the idea is
nonsense. There has been a continuing, albeit concealed, alliance between international
political capitalists and international revolutionary socialists-to their mutual benefit.

But what is the appeal of a World Government to such canny rationalists as the
Rockefellers and others of the international super-rich? You might think that such a
World Government would threaten their financial power and therefore would be the last
thing on earth they would support. The answer is obvious - they expect the coming World
Government to be under their control!

The easiest way to control or eliminate competitors is not to best them in the marketplace,
but to use the power of government to exclude them from the marketplace. If you wish to
control commerce, banking, transportation, and natural resources on a national level, you
must control the federal government. If you and your clique wish to establish worldwide
monopolies, you must control a World Government.

And as Gary Allen wrote, if you want to control national monopolies = National Socialism = Naziism; if you want international monopolies = international socialism = Communism.