I mean they've always kind of a fashy shithole, but they definitely didn't start going hardcore on the pervertry until America culturally colonized them.
its more like since amerikkka occupied them for like 50 years and had a puppet one party dictatorship with extremely right wing ideals rule them but i guess that did start with the unnecessary and horrific murder of hundreds of thousands of civilians committed by the amerikkkans when they dropped the bombs.