How do we reconcile the phrase "Indeed, You do not humble those You have befriended, nor do You honor those You have antagonized" mentioned in the Qunut supplication, with the Jews killing Allah's chosen ones (awliya') from among the prophets? And is protection from killing limited to the Messengers who possess scriptures? In that case, how do we respond to the claim that the Jews killed the Messenger, peace be upon him, with poison?

There is no contradiction between the statement: "And he whom You befriend shall not be abased," and the trials of the prophets. The abasement mentioned in the hadith refers to abasement in the Hereafter. Therefore, no matter what trials Allah's allies face in this world, that does not strip them of their honor and high status with Allah. Allah guaranteed His Prophet Muhammad, peace be upon him, protection from people so that he could deliver the message, but He did not guarantee him immortality. The poison ingested from the Jewish woman did not affect him at that time; rather, he lived for more than four years after it.