Maybe he didn't actually share it to Facebook. He's just going on the fact that he can't find it, and immediately assuming Facebook just deleted it without mention. I'm skeptical any of this happened. That's not how it works.
I posted the photo to my Instagram account and clicked the button to share to Facebook. But while discussing the incident with a colleague last night, I scrolled back and discovered that both posts had been deleted.
So he could have thought he finished everything and in fact not have done anything.
Though rereading it, it did show up on Twitter...
A Facebook page dedicated to cataloging photos and images from the country's history posted a 100-200 year old black and white image of a bare-breasted woman (something not unseen in Ceylon before Europeans missionaries brought Victorian values to the island). This was deleted. A discussion followed, where the majority consensus was that the photos should stay up. But every subsequent attempt to repost resulted in the image being taken down. The administrators of the page eventually gave up.
OP claims it was deleted from both services.