Scary. I never would have thought of someone shooting at a museum, but I guess you have speculated that sooner or later a white supremacist was going open attack the American Holocaust Museum.
I have no idea where these radicals get the idea that the Holocaust never existed. It did exist! Anyone in their right mind and old enough to understand can tell you exactly what the Holocaust was and its purpose was. Adolf Hitler was hellbent to create a 'pure Aryan race' at the expense of millions of innocent Jews, including women and children, as well as people deemed inferior such as those who were disabled or mentally retarded.