Salam, 

Thank you for your question and your concern.

Allah Almighty will never punish a people He didn’t warn or provide evidence for. He Almighty says:

{Whoever is guided is only guided for [the benefit of] his soul. And whoever errs only errs against it. And no bearer of burdens will bear the burden of another. And never would We punish until We sent a messenger.} (Qur’an 17: 15)

So, know for a fact that the Creator, Allah Almighty will never do injustice to anyone.

Allah says in the Quran what means:

{That is for what your hands have put forth and because Allah is not ever unjust to [His] servants.} (Qur’an 3: 182)

{And We had already given Moses the Scripture, but it came under disagreement. And if not for a word that preceded from your Lord, it would have been concluded between them. And indeed they are, concerning the Qur’an, in disquieting doubt. Whoever does righteousness – it is for his [own] soul; and whoever does evil [does so] against it. And your Lord is not ever unjust to [His] servants.} (Qur’an 41: 45-46)

{The word will not be changed with Me, and never will I be unjust to the servants.} (Qur’an 50: 29)

Now with regards to your questions, you can find more detailed answer here by scholars. We hope this helps.

 Please keep in touch. 

Salam.