If that was the intent of congress, they could have simply said 'conviced in any court of the United States'. They didn't, so it's not the job of judicial activists to read such langage into the statute.
Sure they could have said that. It's nuts to think they needed to. It's absurd to think Congress meant to deny a woman her 2nd Amendment rights because she got caught driving a car in Saudi Arabia.
By what rationalle does the Bill Of Rights get subjected to the whims of foreign courts???