And when Our verses are recited to them as clear evidences, you recognize in the faces of those who disbelieve disapproval. They are almost on the verge of assaulting those who recite to them Our verses. Say, "Then shall I inform you of [what is] worse than that? [It is] the Fire which Allāh has promised those who disbelieve, and wretched is the destination."
The Idolators' worship of others besides Allah and Their vehement rejection of the Ayat of Allah
Allah tells us that the idolators, in their ignorance and disbelief, worship besides Allah others which He has sent down no authority for, i.e., no proof or evidence for such behavior. This is like the Ayah:
(And whoever calls upon, besides Allah, any other god, of whom he has no proof; then his reckoning is only with his Lord. Surely, the disbelievers will not be successful.) 23:117 So Allah says here:
لِّكُلِّ أُمَّةٍ جَعَلْنَا مَنسَكًا (For every ummah (religious community) We have appointed a way of worship - 22:67). This sentence has come earlier in almost identical words in verse number 34 of this Surah, but the word مَنسَكً (mansak) conveys a different meaning in each verse. In the earlier verse the words مَنسَكً and نسَكً have been used in the context of the rites of Hajj and mean sacrifice of animals, while in the present verse the word مَنسَكً has been used in the sense of the rules of slaughter or general rules of worship. That is why, unlike the verse 34, the present verse does not have the conjunctive letter ' وَ ' (i.e. 'and' ) in the beginning.
Inevitably, the call for pure monotheism is intolerable to those who have reposed their faith in many gods rather than in the one and only God. They become deeply agitated when their gods and beloved personalities are criticised. Being unable to refute by rational arguments the call of Truth, they resort to violence against the upholder of the call of monotheism, and want him to be eliminated altogether. When told by God that their behaviour is unwise in the extreme, they are not prepared to bear even verbal criticism. But what will be their condition subsequently when they will be required to undergo the punishment of Hellfire on account of their opposition to the Truth?
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.