Guidance and misguidance
God guides whomever He wants to guide; God only knows who deserves the guidance, and so He will guide him, in order to reward him in Paradise in heaven.
You cannot guide anyone even if you like him and you are earnest to bring him to God's religion: that God is One without associate or son and to believe in all the messengers or apostles of God including Jesus and Mohammed, and to believe in the Next Life.
(Quran 10: 100. No soul can believe [according to your will, Mohammed], but only according to God's leave [to His angels to inspire him e.]
And He lays [psychological] illness on those who do not use their reason [but they hold fast with the traditions of their fathers.]
------------------------------------------------
e It means: God gives permission to His angels to let him long to the belief, and make him desire in it, by means of inspiring into him, so that he will believe and convert.
On the other hand, those who do not deserve the guidance, because of their wrong-doing, God will leave them to Satan and his devils to suggest to them and take control of them, and they being unaware, so that they will increase in error and misguidance, and die as unbelievers and go to Hell in the Next Life.