There was actually a user on Lemmy that asked if the original photo for the massacre was AI. It hadn’t occurred to me that people who never heard of the 1989 Tiananmen Square protests and massacre would find the image and question if it was real or not.
Photoshop has existed for years. It's no different than a student in 2010 being shocked at the horrors of man and trying to figure out how it could be faked with a computer. People have denied the Holocaust for generations!
It is different. The old Photoshop process took a lot of time. Now an image can be manipulated incredibly quickly and spread almost as fast before anyone has time to do anything about it.