Refuting the Christians' claim that Jesus is the son of Allah

Question:
May Allah reward you. The questioner says: Among the doubts of the Christians is that they claim that 'Isa is better than Muhammad (peace and blessings be upon him) because 'Isa has no father, whereas Muhammad has a father. They attribute to 'Isa that he is the son of Allah. Far is He above what they say, exalted greatly. How do we respond to this doubt?

Answer:
Allah has no son and no offspring. So they disbelieved in Allah and did not purify Allah from deficiency, from having a child, from having a wife, and from... they did not purify Allah from deficiency. So which one purified Allah from having a wife: or the one who says that Allah is the third of three, that Allah is the Messiah, the son of Mary, the Messiah, the son of Allah? This one has purified Allah. They are the liars. And Muhammad is the best of the prophets and messengers. And excellence is from Allah, whom He wills among His servants. There is no restriction on Allah to bestow favor on some of His servants. He knows best the places of His favor and His kindness, and who is suitable for it and who is not. He knows best, Glorified and Exalted is He. We do not object to Allah, Mighty and Majestic. And 'Isa is not the son of Allah as they say. 'Isa was created by Allah with the word "Be," and He said to him, "Be, and he was." He said to him, "Be, and he was." With this word, 'Isa (peace be upon him) came into existence without a father. For this reason, he is called the Word of Allah. Because Allah created him with a word, without a father. So he has excellence in this; there is no doubt that he is the Word of Allah, that Allah created him with a word without a father.
But he is not the son of Allah. Far is He above what they say, for Allah has no son . And if this is an excellence for 'Isa, that he came into existence without a father, then Adam is more deserving of the excellence, because Allah created him without a mother and without a father . He said to him, "Be, and he was." He said to 'Isa, "Be, and he was." So if this is as they claim, then Adam (peace be upon him) is better than 'Isa. Yes.