"The article does not explain why the FBI has such an emphasis." Could be arrest and conviction metrics tied to performance reviews. My uneducated guess is tha

"The article does not explain why the FBI has such an emphasis." Could be arrest and conviction metrics tied to performance reviews. My uneducated guess is that it's much easier to follow IP addresses and arrest/convict domestic criminals than it is to arrest/convict members of the People's Liberation Army. That which gets tracked gets focus.