Historians such as Weinberg have combed through the documentary record, which is abundant, and have been unable to find a single instance of someone being punished for simply refusing to murder civilians. This despite the regime executing tens of thousands of it's own military personnel for a host of crimes. Unless you can show me otherwise I stand by my assertion.
These weren’t civilians any more to Himmler. These were Untermenschen to him. Of course it wouldn’t be shown as “refusing to murder citizens” but some euphemism.