Looks great no need for anything else.
Bruno's father really knows when to argue and when to be silent, the problem is that he only does this for his own benefit and regardless of how his argument or silence can harm, hurt and even confuse other people. It was arguing that Bruno's father was able to establish his authority over those he recognizes as weaker and it was his ability to remain silent that allowed Bruno's father to achieve increasingly successful positions in his profession.
However, these capabilities contributed to Bruno's confusion and curiosity about the prisoners. It was exactly this curiosity and confusion that made Bruno come to a terrible end.
For this reason, we could advise Bruno's father not to remain silent in the face of injustices against the most disadvantaged people. Furthermore, he should use his ability to argue against injustices and explain to his family the wrong and awful things that are happening.
