Actually,the Nazis sytematically replaced the old,traditional police officials and officers with Nazi Party functionaries and Nazi street thugs, in a process that took several years.Not unlike today ,where the emphasis has shifted from keeping the peace to enforcing the laws.There is a difference though many say it is only semantics.The attitude and the increased willingness to follow orders are the result of deliberate conditioning.
In all, all of Europe, the Gestapo never reached more than 7,000. Further, what explains the near obedience of the French and 15 other nations police forces to invading, foreign Germans?