As I said;
1- If you read the book in its entirety, you will see this truth.
2- If you don't have time to read the book, just read the paragraph you gave in its entirety, and even that will be enough for you to see the truth.
Holy Quran
42:14 And they only divided after the knowledge had come to them, due to resentment among themselves. And had it not been for a predetermined decision from your Lord, they would have been judged immediately. Indeed, those who inherited the Book after them are full of doubts.
42:15 For that, you shall preach and be upright, as you have been commanded, and do not follow their wishes. And say: "I believe in all that God has sent down as a Book, and I was commanded to be with justice between you. God is our Lord and your Lord. We have our deeds and you have your deeds. There is no argument between us and you. God will gather us all together, and to Him is the ultimate destiny."
42:16 And those who debate about God, after they had been answered, their argument is nullified at their Lord. They have incurred a wrath, and will have a severe retribution.
42:17 God is the One who sent down the Book with the truth, and the balance. And for all that you know, the Hour may be very near.
42:18 Those who do not believe in it seek to hasten it, while those who believe are concerned about it, and they know that it is the truth. Certainly, those who dispute the Hour have gone far astray.
****
Look, when you read the paragraph in its entirety, it is easy to see that the deniers are criticized for insisting on their denial. So it's not about arguing. Or it's not about exchanging ideas here. The issue here is that the deniers continue their denial. pagans do not give up their pagan beliefs. In other words, insisting on the wrong is criticized, not arguing here. Not believing the truth despite the evidence is criticized.
Peace