Re: So leave them, [O Muhammad], for you are not to be blamed.
The interpretation of the verse is** "Indeed you [can not] guide whom[ever] you like [meaning you are a guide] but Allah guides whom He wills [Allah guides and chooses them] And He is most knowing of the [inc those who will be] [rightly] guided.
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**[Raad 13:7] The disbelievers say, “Why is not a sign sent down upon him from his Lord?” You are purely a Herald of Warning, and a guide for all nations.
[Shoora 42:52] And this is how We sent the divine revelation to you (O dear Prophet Mohammed - peace and blessings be upon him) - a life giving thing, by Our command; neither did you know the Book nor the detailed commands of religion, but We have made this Qur’an a light by which We guide whomever We will from Our bondmen; and indeed you surely do guide to the Straight Path.**
Only for those who are not given faith, be it disbelievers or hypocrites. Prophethood is to guide
Narrated Abu Huraira: Allah’s Apostle said, “You see me facing the Qibla; but, by Allah, nothing is hidden from me regarding your bowing and submissiveness and I see you from behind my back.” [Bukhari]