26:105 The people of Noah disbelieved the messengers. 26:106 Their brother Noah said to them, “Would you not be righteous? 26:107 “I am an honest messenger to you. 26:108 “You shall reverence GOD and obey me. 26:109 “I do not ask you for any wage. My wage comes from the Lord of the universe. 26:110 “ You shall reverence GOD and obey me.” 26:111 They said, “How can we believe with you, when the worst among us have followed you?” 26:112 He said, “ How do I know what they did? 26:113 “Their judgment rests only with my Lord, if you could perceive. 26:114 “ I will never dismiss the believers. “I am no more than a clarifying warner.” They said, “Unless you refrain, O Noah, you will be stoned.” He said, “My Lord, my people have disbelieved me. “Grant me victory against them, and deliver me and my company of believers.” We delivered him and those who accompanied him in the loaded ark. Then we drowned the others. This should be a lesson, but most people are not believers. Most assuredly, your Lord is the Almighty, Most Merciful.
26:105, 123, 141, 160, and 176 uses the term messengers (plural) this shows that if someone disbelieves a messenger they are disbelieving all the messengers.
What did the people of Noah worship?
71:23 “They said, ‘Do not abandon your gods. Do not abandon Wadd, Suwaa’, Yaghouth, Ya’ooq, and Nasr.’ 71:24 “They misled many. Therefore, let the wicked plunge deeper into loss.”
Stoning is in the Quran and it is only done by the disbelievers
18:20 “If they discover you, they will stone you, or force you to revert to their religion, then you can never succeed.”
19:46 He said, “Have you forsaken my gods, O Abraham? Unless you stop, I will stone you. Leave me alone.”
36:18 They said, “We consider you bad omens. Unless you refrain, we will surely stone you, or afflict you with painful retribution.”
11:91 They said, “O Shu`aib, we do not comprehend many of the things you are telling us, and we see that you are powerless among us. If it were not for your tribe, we would have stoned you. You have no value for us.”
26:116 They said, “Unless you refrain, O Noah, you will be stoned.”
25:37 Similarly, when the people of Noah disbelieved the messengers, we drowned them, and we set them up as a sign for the people. We have prepared for the transgressors a painful retribution.
6:52 And do not dismiss those who implore their Lord day and night, devoting themselves to Him alone. You are not responsible for their reckoning, nor are they responsible for your reckoning. If you dismiss them, you will be a transgressor.
Believers are United
3:103 You shall hold fast to the rope of GOD, all of you, and do not be divided. Recall GOD’s blessings upon you—you used to be enemies and He reconciled your hearts. By His grace, you became brethren. You were at the brink of a pit of fire, and He saved you therefrom. GOD thus explains His revelations for you, that you may be guided. 3:104 Let there be a community of you who invite to what is good, advocate righteousness, and forbid evil. These are the winners. 3:105 Do not be like those who became divided and disputed, despite the clear proofs that were given to them. For these have incurred a terrible retribution.
4:94 O you who believe, if you strike in the cause of GOD, you shall be absolutely sure. Do not say to one who offers you peace, “You are not a believer,” seeking the spoils of this world. For GOD possesses infinite spoils. Remember that you used to be like them, and GOD blessed you. Therefore, you shall be absolutely sure (before you strike). GOD is fully Cognizant of everything you do.
11:27 The leaders who disbelieved among his people said, “We see that you are no more than a human being like us, and we see that the first people to follow you are the worst among us. We see that you do not possess any advantage over us. Indeed, we think you are liars.”