They have certainly disbelieved who say that Allah is Christ, the son (5:17)

Almuntakhab Fi Tafsir Alquran Alkarim

Infidels indeed are those who declare: Allah is the Messiah, ‘Isa, the son of Maryam. Say to them O Muhammad Who then can restrain Allah if He willed to do away with the Messiah, ‘Isa, the son of Maryam, his mother and all those domiciled on earth! To Allah, alone, belong all that is in the heavens and on earth and all in between; He brings into being whatever He will; He is indeed Qadirun (Omnipotent) to effect all things

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(5:17) Indeed those who said: 'Christ, the son of Mary, he is indeed God', disbelieved. *39 Say (O Muhammad!): 'Who could have overruled Allah had He so willed to destroy Christ, the son of Mary, and his mother, and all those who are on earth?' For to Allah belongs the dominion of the heavens and the earth and all that is between them; He creates what He wills. *40 Allah is All-Powerful.

They have certainly disbelieved who say that Allah is Christ, the son meaning

*39). The original mistake committed by the Christians in declaring Jesus to be a combination of human and divine essences turned Jesus into a mystery for them, and the more the Christian scholars tried to solve this mystery by resorting to conjecture and rhetorical extravagance the more involved the whole matter became. Those who were more impressed by the humanity of Jesus stressed his being the son of God and considered him to be one of the three gods. Those who were more impressed by the divinity of Jesus considered him to be none other than God, stressing that he was the human incarnation of God, and worshipped him as God. Those who tried to strike a middle path spent all their efforts hammering out subtle verbal formulations of the Trinity that would allow people to consider the Messiah to be God and man at one and the same time, to affirm that God and the Messiah are independent and simultaneously constitute an inseparable whole (see Surah 4, nn. 212, 213, 215 above).
*40). This statement hints at the childishness of those who have been misled into believing that the Messiah himself is God either because of his miraculous birth or because of his flawless moral character or because of the miracles which he performed. The Messiah is merely a sign of the innumerable wonders of God's creation; a sign which somehow dazzled the eyes of those superficial people. Had their perception been wider they would have been able to see that there are even more inspiring examples of His creation and infinite power. If anything their attitude was indicative of the intellectual puerility of those who were so overawed by the excellence of a creature as to mistake him for the Creator. Those whose intelligence penetrates through the excellence of creatures, who look upon them merely as signs of the magnificent power of God, and who are led by such observations to a reinforcement of faith in the Creator are truly wise.
 

They have certainly disbelieved who say that Allah is Christ, the son meaning in Urdu

یقیناً کفر کیا اُن لوگوں نے جنہوں نے کہا مسیح ابن مریم ہی خدا ہے اے محمدؐ! ان سے کہو کہ اگر خدا مسیح ابن مریم کو اور اس کی ماں اور تمام زمین والوں کو ہلاک کر دینا چاہے تو کس کی مجال ہے کہ اُس کو اِس ارادے سے باز رکھ سکے؟ اللہ تو زمین اور آسمانوں کا اور اُن سب چیزوں کا مالک ہے جو زمین اور آسمانوں کے درمیان پائی جاتی ہیں، جو کچھ چاہتا ہے پیدا کرتا ہے اور اس کی قدرت ہر چیز پر حاوی ہے