The banner, which is featured on every Arabic-language Wikipedia page, accuses Israel of killing civilians and targeting hospitals and schools before calling for a "just and comprehensive peace."
"Our high school history books were printed in 1934," explained one fictional Holocaust denier.
As Wikipedia Israel celebrates 20 years, many are questioning if it will be affected by new artificial intelligence tools.
The online encyclopedia stopped short of taking more aggressive action in response to allegations of widespread Holocaust distortion on the platform.
Most terror victims' Wikipedia pages are deleted after they stop being relevant, a new project aims to create memorial pages for victims and their families.
A Polish group has taken to Wikipedia to distort Holocaust history – all while finding a way to evade editors on the website.