That mankind was created with the same faith, i.e, there is no God (supreme authority) except Him, is reflected at the time of a dire situation!

Verses 30-33 of Chapter 30

Therefore set your attention for obeying Allah, devoted solely to Him; the foundation set by Allah, upon which He created man; do not change what Allah has created; this is the proper religion - but most people do not know. Inclining towards Him - and fear Him, and keep the prayer established, and never be of the polytheists. Those who broke their religion into several parts and became different groups; every group is happy with what it has. And when some affliction reaches men, they pray to their Lord inclining towards Him - and when He gives them a taste of His mercy, thereupon a group among them begins setting up partners to their Lord!

Suffering in the way of God is a trial rather than a punishment from Him!

Verses 10-11 of Chapter 29:

Of mankind are some who say: "We believe in Allah.'' But if they are made to suffer for Allah, they consider the trial of mankind as Allah's punishment; and if victory comes from your Lord, they will say: "Verily, we were with you.'' Is not Allah Best Aware of what is in the breasts of the creatures. And indeed Allah knows those who believe, and verily, He knows the hypocrites.

Does God not guide to the right pathway those people who follow their desires without following His guidance?

Verse 50 of Chapter 28:

So if they do not accept your challenge, then know that they only follow their desires; and who is more astray than one who follows his desires away from the guidance of Allah? Indeed Allah does not guide the unjust.

People deny the revelations of God without comprehending them by knowledge!

Verses 83-84 of Chapter 27:

And (remind them of) the Day when We shall gather out of every nation a host of those who denied Our revelations, and they will be set in array; Till, when they come (before their Lord), He will say: Did ye deny My revelations when ye could not compass them in knowledge, or what was it that ye did?