From that Wikipedia page.

the Wehrmacht was an apolitical organization along the lines of its predecessor, the Reichswehr, and was largely innocent of Nazi Germany's war crimes and crimes against humanity, behaving in a similar manner to the armed forces of the Western Allies. This narrative is false, as shown by the Wehrmacht's own documents, such as the records detailing the executions of Red Army commissars by frontline divisions, in violation of the laws of war.

The Waffen-SS, in turn, attempted to benefit from the clean Wehrmacht myth by their veterans declaring the organisation to have virtually been a branch of the latter, and to have fought as "honourably" as it. Its veteran organisation, HIAG, attempted to cultivate a myth of their soldiers having been "Soldiers like any other".[5]