The ruling on averting the hadd (fixed punishment) from the sorcerer to avert fitnah (trial, discord or temptation)

Question:
How do we reconcile the fact that the Messenger (peace and blessings be upon him) did not kill the Jew who cast a spell on him, with what the Companions did in killing the sorcerer?

Answer:
And Allah knows best; because the Messenger was averting fitnah (trial, discord or temptation), since this man was a Jew, and the Jews were present in Madinah. For this reason, he said, "I fear that I would open up [a path] for the people, and I do not like to open up evil for the people." If the fitnah (trial, discord or temptation) is more severe, it is averted. For this reason, the Prophet (peace and blessings be upon him) did not kill the hypocrites despite their kufr (disbelief) and despite the ugly statements coming from them. He did not kill them so that people would not talk and say that Muhammad kills his companions. People do not know; they assume that these are Companions and that the Messenger killed them. This would turn people away from Islam. So if the mafsadah (harm) is greater, the hadd may be averted.
By averting the hadd from the person for the sake of wisdom. The Jew whom the Messenger (peace and blessings be upon him) did not kill, because killing him would result in more mafsadah (harm) than the victory of his Companions and the Jews, and so on.