The NY law, hastily thrown together, doesn’t exempt LEOs from the mag capacity limitation. Because after all, “No honest man needs more than 7 rounds, anyways.”
“Did she just say that the reason the Marines are posted at embassies is to protect classified information, not people?”
Yes, because that is their role. The Marines at embassies are highly HIGHLY trained individuals whose main objective is the protection and (should it be required) swift destruction of classified materials.