We will Never Forget the six million who perished as Jews. But remember that only one Jewish grandparent made you a "Jew" to Hitler, so many Christians and Christian converts died as Jews. Even being married to someone classified as a "Jew" could be a death sentence.
We also risk forgetting the other five million who died for being gay, a gypsy, a political minority, or other "undesirables." We shouldn't forget the "righteous Gentiles" who risked their lives (or lost them) to save Hitler's intended victims. Or all the others who died because of one man's personal madness: in the countries he invaded, the militaries he faced, the German population, and anyone else who stood in his way.