This is what it was founded on:
"The coming together of the nations of Europe requires the elimination of the age-old opposition of France and Germany. Any action taken must in the first place concern these two countries."
"On 11 August 1952, the United States was the first non-ECSC member to recognise the Community and stated it would now deal with the ECSC on coal and steel matters, establishing its delegation in Brussels. Monnet responded by choosing
Washington, D.C. as the site of the ECSC's first external presence. The headline of the delegation's first bulletin read "
Towards a Federal Government of Europe". "
I don't know what more you can expect of these people, 6 years after a world war, 2 years after (West) Germany even became a sovereign country. Trust and friendship are built and they skipped a lot of steps on that way.