The internet is a multinational asset. As such it should not belong to a single country.

The internet is a grouping of various smaller nets, it was not put in place solely by the USA. That is like saying Germany put in place all the worlds highways because they had the first Autobhan...

Also as pointed out most of the work that consitutes what we use as the internet was done by international scientists who were trying to share information more quickly to work on projects. CERN being the most obvious case. Along with computer companies adding in their own network topologies.