Allah does not compel Belief (Surah Yunus 10:99-100)

It is not Part of Allah's Decree to compel Belief


And had your Lord willed  meaning `O Muhammad (Sallallahu Alayhi wa Sallam), if it had been the will of your Lord, He would make all the people of the earth believe in what you have brought to them. But Allah has wisdom in what He does.' Similarly, Allah said:

And if your Lord had so willed, He could surely have made mankind one Ummah, but they will not cease to disagree. Except him on whom your Lord has bestowed His mercy and for that did He create them. And the Word of your Lord has been fulfilled (His saying): "Surely, I shall fill Hell with Jinn and men all together.'' (Surah Hud 11:118-119)

He also said,

Have not then those who believed yet known that had Allah willed, He could have guided all mankind) (Surah Ar-Ra’d 13:31)  Therefore, Allah said:

So, will you then compel mankind  and force them to believe.

until they become believers  meaning, it is not for you to do that. You are not commanded to do that either. It is Allah Who

Sends astray whom He wills, and guides whom He wills.(Surah Fatir 35:8).

So do not destroy yourself in sorrow for them. (Surah Al-Kahf 18:6)

It is not up to you to guide them, but Allah guides whom He wills.(Surah Al-Baqarah 2:272).

It may be that you would kill yourself with grief because they are not believers.) (Surah Ash-Shu’ara’ 26:3)

You guide not who you like.. (Surah Al-Qasas 28:56)

Your duty is only to convey, and it is up to Us to reckon.  (Surah Ar-Ra’d 13:40)

So remind, you are only one who reminds. You are not a dictator over them. (Surah Al-Ghashiyah 88 :21-22)

There are other Ayat besides these which prove that Allah is the doer of what He wants, guiding whom He wills, leading whom He wills to stray, all out of His knowledge, wisdom, and justice. Similarly, He said,

It is not for any person to believe, except by the leave of Allah, and He will put the Rijs That is, disorder and misguidance

upon those who do not reason meaning, Allah's proofs and evidences, and He is the Just in all matters, guiding whom He wills to guide, and leading whom He wills astray.

Reference: Tafsir ibn Kathir (abridged) English version.