In 1933, Eberlein wrote the paper Was ist deutsch in der deutschen Kunst,[3] in which he led his fight "against everything anational, anti-national, international in German art".
[4] With recourse to Herder, Goethe, Fichte and Spengler, he also took sides with National Socialism and propagates a new German art beyond Expressionism.
[7] Eberlein bekannte sich offensiv und radikal zu den Ideen des Nationalsozialismus.
Among other things, Eberlein published on the Nazarene movement as well as German Romanticism and its main representative Caspar David Friedrich.
During the Second World War, Eberlein wrote articles for the Leipzig Illustrirte Zeitung (Das Opfer.