Showing Hitler (or any other mass murderer) as a monster only de-humanizes him.
It convinces the viewer that Hitler was some "thing" that existed in a far away land a long time ago.
It densensitzes the viewer to the banality of evil -- the fact that real, live human beings can and do commit monstously evil acts.
I'm quite sure that Justice Blackman led a nice, quiet homelife with his wife, and was -- in many ways -- quite an avuncular human being.
And yet, he penned and signed a Supreme Court decision that has meant the death of millions of human lives.
Avuncular people can and do monstrous things.
Amen - I'm sure the families and neighbors of abortionists think that they are swell guys, whether they know what the "doctor" is doing to make himself rich or not.
tSG