Who has to be blamed for belief and disbelief? and for the wrongs done?
It is those who have gone astray to be blamed for their wrong doings, whether it is evil actions or disbelieving in Allah Almighty.
Allah Almighty said in the Noble Quran "Is he, then, to whom the evil of his conduct is made alluring, so that he looks upon it as good, (equal to one who is rightly guided)? For Allah leaves to stray whom He wills. So let not thy soul go out in (vainly) sighting after them: For Allah knows well all that they do ! (The Noble Quran, 35:8)"
Also in Noble Verse 16:93, Allah Almighty helps whom ever He wants and leaves astray whom ever he wants. Depending on our intentions in this life, we might gain the love of GOD or gain His dislike or hate. Allah Almighty is not obligated to help everyone He creates. He gives us choices and makes the straight path to follow crystal clear for us. It is ultimately up to us (the humans) to make the decission of going with the path of Allah Almighty or go with the path of Satan and evil. See also 45:15.
We humans have a choice. We can either choose Satan's path or Allah Almighty's
path. Allah Almighty would inspire whom He feels are worthy for His help and
inspiration. Otherwise, He would leave them alone. It is all up to you and me.
It all depends on our intentions toward teating our fellow humanbeings. Be
nice to your parents, to your neighbors and to others; worship Allah Almighty; try your
best to be honest and truthful; and try your best to not hurt others even in the least
things.
This topic is further discussed in this site: Is Evil from Satan,
Ourselves or Allah?