The words "never forget" should not be exclusive to Jews, all should remember when, how and why.
I still remember certain shows about liberated camps, the last one I saw was one about Patton's 3rd Army as he rescued a son-in-law at a POW camp that nearly blew up in his face, shortly after that they liberated the Buchenwald concentration camp (6th Armored Division). They interviewed people, one of them a nurse, I cannot imagine seeing what they saw. Combat vets who experienced the worst that war has to offer were stunned and sickened at what they saw.
Never forget.