Why extradite Nikulin?

A key point of the indictment of suspected Russian hacker Yevgeny Nikulin is the statement that Nikulin, "in the Northern District of California and elsewhere, ... intentionally accessed a protected computer." Nowhere does it state that he was presumably in Russia at the time. A key point of the bilateral treaty that allowed Justice Min. Robert Pelikán to send Nikulin to the U.S. is that extradition applies to a crime committed in a third state if it would be a crime in the "Requested State" (meaning in this case the CR). If not, the Requested State may still use its discretion and grant extradition. This is apparently what Pelikán did, and it is this "extraterritorial jurisdiction" by the U.S. that has angered the Russians so much. The LinkedIn accounts of citizens of the CR were also presumably hacked, yet no issue has been made of this. Perhaps in this internet age, it's time for Czech authorities to start exercising some extraterritorial jurisdiction of their own in going after hackers.