A Football Association commission found Crystal Palace goalkeeper Wayne Hennessey to have shown a “lamentable” lack of knowledge about Hitler, fascism and the Nazi regime.
The Wales international was found not guilty this month of making a Nazi salute after being pictured with his right arm in the air and his left hand over his mouth in a picture posted by Palace team-mate Max Meyer on Instagram.
Despite Hennessey not facing any punishment, the FA published its written reasons for the decision on Tuesday.
“Mr Hennessey categorically denied that he was giving a Nazi salute,” the FA commission said.
“Indeed, from the outset he said that he did not even know what one was. Improbable as that may seem to those of us of an older generation, we do not reject that assertion as untrue.
“In fact, when cross-examined about this Mr Hennessey displayed a very considerable – one might even say lamentable – degree of ignorance about anything to do with Hitler, fascism and the Nazi regime.
“Regrettable though it may be that anyone should be unaware of so important a part of our own and world history, we do not feel we should therefore find he was not telling the truth about this.
“All we would say (at the risk of sounding patronising) is that Mr Hennessey would be well advised to familiarise himself with events which continue to have great significance to those who live in a free country.”