Actually, Rommel did buy into Nazi ideology to a good degree. While he was never an ardent Nazi, he accepted more of their politics and doctrine than many other high ranking Wehrmacht officers did. Prior to the war, Hitler selected him personally to command his escort battalion, the Führerbegleitbatallion. One of the reasons he was shuttled off to N. Africa was the Wehrmacht's top generals saw his popularity with Hitler as a threat to their own positions so they promoted him to generalleutnant (lieutenant general) and sent him to N. Africa.
Of course, Rommel made a name for himself he could never have done in Russia.
In the end, Rommel became less and less enamored of Hitler and the Nazis and this was why he participated in the April 20th 1944 assassination attempt that ended up costing him his life.