Does God forgive whomsoever He pleases the sins other than setting up partners with Him?

Verse 48 of Chapter 4:

Verily, Allah forgives not that partners should be set up with Him (in worship), but He forgives except that to whom He wills; and whoever sets up partners with Allah in worship, he has indeed invented a tremendous sin.

Verse 88 of Chapter 6:

This is the guidance of Allah with which He guides whomsoever He wills of His servants. But if they had joined in worship others with Allah, all that they used to do would have been of no benefit to them.

Other supporting and relevant verses:

Verse 31 of Chapter 4

If you avoid the great sins which you are forbidden to do, We shall remit from you your (small) sins, and admit you to a Noble Entrance (i.e. Paradise).

Verse 32 of Chapter 53
Those who avoid great sins and shameful deeds, only (falling into) small faults,- verily thy Lord is ample in forgiveness. He knows you well when He brings you out of the earth, And when ye are hidden in your mothers’ wombs. Therefore justify not yourselves: He knows best who it is that guards against evil.

Verse 100 of Chapter 6

Yet, they join the Jinns as partners in worship with Allah, though He has created them, and they attribute, falsely without knowledge - sons and daughters to Him. Be He Glorified and Exalted above what that they attribute to Him.

Verse 31 of Chapter 9

They (Jews and Christians) took their rabbis and their monks to be their lords besides Allah, and (they also took as their Lord) the Messiah, son of Maryam, while they were commanded to worship none but One God, none has the right to be worshipped but He. Praise and hallowed be He above what they associate (with Him).

Verse 22 of Chapter 14

And Shaytan will say when the matter has been decided: "Verily, Allah promised you a promise of truth. And I too promised you, but I betrayed you. I had no authority over you except that I called you, and you responded to me. So blame me not, but blame yourselves. I cannot help you, nor can you help me. I deny your former act in associating me (Shaytan) as a partner with Allah (by obeying me in the life of the world). Verily, there is a painful torment for the wrongdoers.''
 

Verses 43-44 of Chapter 25

Have you ever considered the case of the person who has made his lust his god? Can you take the responsibility of guiding such a one aright? Do you think that most of them hear or understand? They are only like the cattle; nay, even worse than the cattle.

Why does God command not to force anyone to embrace Islam?

Verse 256 of Chapter 2:

There is no compulsion in religion. Verily, the right path has become distinct from the wrong path. Whoever disbelieves in Taghut and believes in Allah, then he has grasped the most trustworthy handhold that will never break. And Allah is All-Hearer, All-Knower.

A true believer not only serves God by worshiping Him alone, but also the people of various classes by showing kindness towards them!

 

Verses 36-38 of Chapter 4:

Worship Allah and join none with Him in worship, and do good to parents, kinsfolk, orphans, the poor, the neighbor who is near of kin, the neighbor who is a stranger, the companion by your side, the wayfarer (you meet), and those (slaves) whom your right hands possess. Verily, Allah does not like such as are proud and boastful.Those who are stingy and encourage people to be stingy and hide what Allah has bestowed upon them of His bounties. And We have prepared for the disbelievers a disgraceful torment. And (also) those who spend of their wealth to be seen of men, and believe not in Allah and the Last Day, and whoever takes Shaytan as an intimate; then what a dreadful intimate he has!

Why has God made men protectors and maintainers of women in families?

Verse 34 of Chapter 4:

Men are the protectors and maintainers of women, because Allah has made one of them to excel the other, and because they spend (to support them) from their means. Therefore the righteous women are Qanitat (obedient), and guard in the husband's absence what Allah orders them to guard. As to those women on whose part you see ill conduct, admonish them, and abandon them in their beds, and beat them, but if they return to obedience, do not seek a means against them. Surely, Allah is Ever Most High, Most Great.

Instead of envying others for what God has specially given to them, one should ask for His bounty?

Verse 32 of Chapter 4:

And do not covet what Allah has given some of you more than others: the men shall have their due share according to what they have earned and the women shall have their share according to what they have earned. So pray to Allah for His bounty; most surely Allah has perfect knowledge of everything.

Why does God wish to impose light restrictions through His legislation and orders on Human beings?

Verse 28 of Chapter 4:

Allah wills to make your restrictions light, for Man has been created weak by nature.

Why do the human laws of inheritance fail to ensure the justice?

Verse 11 of Chapter 4:

As regards inheritance, Allah enjoins you concerning your children that: The share of the male shall be twice that of the female. In case the heirs be more than two females, their total share shall be two-thirds of the whole and if there be only one daughter, her share shall be half of the whole. If the deceased has children, each of his parents shall get one-sixth of the whole, but if he be childless and his parents alone are his heirs, the mother shall have one-third of the whole. If the deceased has brothers and sisters also, the mother shall be entitled to one-sixth of the whole. The division of all these shares shall take place only after fulfilling the terms of the will and after the payment of the debt (if any). As regards your parents and your children, you do not know who is more beneficial to you. Allah has apportioned these shares and most surely Allah is All-Knowing, All-Wise.

Does God distinguish the wicked from the good in the Muslim Community?

Verse 179 of Chapter 3:

Allah will not leave the believers in the state in which you are now, until He distinguishes the wicked from the good. Nor will Allah disclose to you the secrets of the Unseen, but Allah chooses of His Messengers whom He wills. So believe in Allah and His Messengers. And if you believe and have Taqwa of Allah, then for you there is a great reward.