Although Superfish was founded in Israel, they're headquartered in Palo Alto now.
The nationality of Lenovo is relevant insofar as it affects the applicability of US law. IANAL so I can't say how relevant that fact is, but I suspect it complicates litigation..
As long as lenovo makes money in the USA, they are easily subject to litigation there.
Damn right. A grand jury can indict without the defendant present (in fact that's how it usually works). Then the US can work to extradite, or just arrest if any of the defendants ever try to enter the US.
Well, you know, we don't even arrest employees of American companies, like anyone on Wall Street.