Because the social media giants should be held responsible for the damaging stuff they host and push through algorithms that target hate and an adapted “if it bleeds it leads” style of pushing things just to keep people enraged and engaged.
Why do you think removing child porn, animal crushing videos, and suicide content is a bad thing?
They paid a freelance photographer for pictures because that’s pretty much all they do.
The photographer may be a terrorist douchebag, but if he’s got pictures of spider-man then we’re all gonna still want to see them.