(Say: "O you disbelievers! I worship not that which you worship.")109:1-2 to the end of the Surah. Ibrahim Al-Khalil (the Friend) and his followers said to the idolators among their people:
In the concluding verse (32), it was said: فَذَٰلِكُمُ اللَّـهُ رَبُّكُمُ الْحَقُّ ۖ فَمَاذَا بَعْدَ الْحَقِّ إِلَّا الضَّلَالُ (So, that is Allah, your Lord in truth. And what is there, after truth, but error?), that is, ` this is the Sacred Being whose attributes of perfection have just been mentioned. Once you have found the Truth, there remains nothing else to find except error and straying. In other words, once it stands proved that Allah Ta` ala is the only true and rightful object of worship, it is terribly senseless to abandon this truth and allow yourself to be diverted elsewhere.
important note
In relation to issues of religious beliefs embedded in this verse, it must be borne in mind that the statement: مَاذَا بَعْدَ الْحَقِّ إِلَّا الضَّلَالُ (What is there, after truth, but error?) proves that there is no intermediary link between truth and error. What is not the truth will be included in error and straying. There can be no such thing that is neither truth nor error. And it is also not possible that two opposite things could be the truth. This is an established rule in the sight of the majority of scholars in the Muslim Ummah. However, difference exists among ` Ulama' regarding minor and subsidiary juristic issues. In the view of some of them, both sides would be considered as on truth in Ijtihad-based issues and, according to the majority of them, there is consensus on the view that the taking of contra-position in Ijtihad-based problems cannot be termed as error and straying.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 41–44
One who does not embrace the Faith is, in the eyes of God, mufsid (a disturber of the peace) because it is only by disturbing his nature that it is possible for anyone to prevent himself from accepting the truth. Such a man curbs the voice of his conscience; he does not put to use his thinking capacity; he ignores clear reasoning by uttering false words; he is not receptive even after listening and does not try to understand even after having had everything explained to him. He gives preference to his prejudices, and his self-interests overwhelm the truth. Those who argue falsely, and at length, go on arguing till the last, saying: ‘You mind your own business and I’ll mind mine.’ To make such a statement seems to them like a way of avoiding defeat. But a missionary performs his work, rising above the psychology of victory or defeat. So, when he observes that the opponent has stooped to adopt an adamant and stubborn attitude and finds that there is no use in arguing further, he disassociates himself by saying that real decision is with God; and that his opponent’s final fate will be in accordance with his position in God’s assessment.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.