In brief...
In brief, if you choose obedience to God and His Messenger it would be better both for your worldly life and your eternal life in the Hereafter. Reconciliation between Muslims The law of Islam considers its followers brothers of one another and says that all are like the leaves of a single tree and limbs of a single body. If one person is in trouble, others cannot remain unconcerned.
Therefore, if there occurs any ill will or trouble between two or more persons; the duty of all others is well wishing, admonition and good advice; and finally, if because for any reason, it is not remedied, then, as an inevitable measure, for preventing furtherance of final trouble, force should be applied against one who is lying, and before things get worsened, stamp out the mischief and end the trouble.
Of course justice, piety, divine aspect and spiritualism should be kept in mind, both in war and peace. These are the itineraries contained in the third part of this holy Surah. Find and Remove the Roots of differences For preserving amity in Muslim society, it is necessary that, first, the elements or factors of disintegration should be found and then they should be removed.
The main factors that tear the hearts apart are having bad opinion or misunderstanding about one another and thereafter, in following and spying one another and then making a mockery of one another and calling by insulting titles to tease one another and even back biting one another and showing oneself higher than the other by way of ego and pride.
If these evils are found out and eliminated there will be no more quarrels between Muslims and the tree of Islam will bear desired fruits, happiness for all. In order to stop such things, the Holy Qur’an admonishes us all that one must never make a mockery of others because; it is quite possible that the one whom you are mocking may be better than you. So do not call one another names. The Holy Qur’an regards spying on others and forming bad opinion about others a sin.
It equates backbiting with eating carrion. From preventing one from pride and ego, the Holy Qur’an says that the origin of creation of all is one and the same. They are all born of a father and a mother, and there is no distinction for one over another from this aspect. It says that all natural differences (like color, languages etc) are for recognition, not for self-glorification. Such noteworthy subjects form the fourth part of this holy Surah.