I'm not sure who you are complaining about?
The guy who reported you when he saw explicit images of Asian women and you travelling with a young Asian girl (in your words "Perception is everything")
-or-
the authorities who investigated based on information received?
If the images were of naked men and you, as a male, were travelling with a young boy would that be a different scenario? Your "normal" is not everybody's "normal".
Maybe just delete the images in future?