Unless you're implying that Verisign isn't a US company, just because .com has become the conventional domain for businesses worldwide doesn't change the fact that it's US-based. Similarly, the EU's widespread adoption of Microsoft Office doesn't make it any less American.
It's a bit like .gov and .edu; technically exclusive to the US. The difference is that .com and .org were opened up for anyone to purchase.
And it goes deeper than just intent: .com was literally administered under a US government contract for decades, with Verisign only ending up in control because they acquired the company that held that government contract.
So while anyone can buy a .com today, the infrastructure and oversight have always been firmly American.