Here's a strange one I came upon:
Luther was a stern disciplinarian with his children. On one occasion, he commented that he would prefer to have a “dead rather than a disobedient son” (Luther, WA, TR 5: 489, n. 6102). On another occasion, he forbade his son to see him for three days as punishment for his disobedience. At the end of the period, he required the boy to write a letter begging his father' forgiveness.
6102. (B. 1, 253) Martin Luther refused to accept his eldest son John for three whole days, although he had humbly supplicated in writing, interceding with his mother, Doctor Iona, Doctor Cruciger and Philip. To whom he replied: I would rather have a dead son than a disobedient one. Paul did not say in vain that a bishop (B. 1, 254) should be such as rules his house well and educates his children well, so that others may be edified and not scandalized. We are set in a high place as an example to all, and our children are a scandal to others; so the boys want to take advantage of our privileges. Finally, even though he often sins, I never or rarely repent, and it happens to us according to the proverb: The evils of our house are the last to be experienced; when all the people have carried us through all the streets, we will experience them first. Therefore he must be punished, and we must not be connived at.
Anne Waldschmidt kindly mentioned work by Christian Mürner (1996), a disability activist who denounces the usual catalogue of supposed Luther-crimes, i.e. wanting to kill disabled children, rebellious peasants and Jews, with focus on the strange boy at Dessau. That work hardly aims for a balanced view of Luther and disabled people in historical context; yet it does discuss some primary Luther texts and quotes a few more writers in German on allied topics.
Christian Mürner (1996), weaving together sources out of context, seems to suggest that little Hans really was in danger: in disciplining his children, supposedly Luther "would not even shrink from murder" (quoting Carl-Heinz Mallet, "nicht einmal vor einem Mord zurückgeschreckt"). This is supported by Luther's 'threat' that "Ich wollt lieber einem toten denn einen ungezogenen Sohn haben", with an unspecified Biblical saying that the Parents' will is God's will, and one should kill disobedient children ("Er beruft sich auf die Bibel, 'der Eltern Diener, under der Eltern Wille is Gottes Wille. Der heisst under gebeut, dass man ungehorsame Kinder töten soll.'") The latter could perhaps refer to the Torah provision, that parents might bring their son before the city elders and accuse him of being stubborn and rebellious, profligate, drunken and leading a riotous life. If proven, the community could stone the delinquent (Deuteronomy 21: 18-21); though in practice, such a penalty was not carried out without serious warnings and community action to correct the behaviour problems (Hertz, 1952, pp. 841-842, 845). One can apply this kind of rhetoric to Luther only by imagining that he was a wild, crazy man in his home, liable to break out and attack his own small children with axe or hammer. Luther's many students and companions, friends and guests, who saw and recorded his everyday behaviour, somehow never met this homicidal maniac.






