The Belgians may have welcomed the Jews, and I know the Dutch and Danes did everything they could to help them, but even their presence in those countries was the result of them being evicted from others. The Jewish experience in Poland, Russia, and MittelEuropa in general is well documented, and it predates the Nazis. Even countries like France and Italy which had no anti-Jewish laws still had no shortage of Nazi collaborators and anti-Semites who helped to round them up for the camps. And of course, no countries (including the US) offered them sanctuary as a people before the war. In spite of many heroic efforts by individual Europeans to do the right thing, government policy throughout Europe was, at best, to look the other way.