This religious brotherhood is not a simple formality and...
This religious brotherhood is not a simple formality and that too of a political nature such that all of humanity – whether or not they have the qualities of brotherhood – should be classified and grouped together as brothers of one another. Rather, the purpose of making the believers brothers of one another points to a series of noble societal and ethical goals and responsibilities that take shape within the greatness of the Islamic brotherhood that the believers must manifest to one another.
All of these responsibilities and goals have been mentioned in the books of Ahadith and Jurisprudence in detail. Therefore, until unity of thought and spirit towards one goal and belief is not established, there can never be firm unity and association of individuals.
If one day, a group of people who are wavering (in belief) in their hearts are seen uniting together under a series of political issues and trying to unite as brothers for a specific cause (other than that of religion), then even the smallest thing would be able to break the unity that was brought about through the mere agreement of thoughts, spirits, difference of (personal benefits) and difference of foundations, and would thus cause them to separate from one another.
A society whose axis or pivot is not based on (unity of) ideas and beliefs and in which everyone acts as individuals will always rotate upon various thoughts and ideologies opposed to one another and no sort of unity or harmony will ever exist amongst those people. Only to that level that unity and harmony protects their material interests will they be able to lead a peaceful life.
If one day a person who is united with others sees that he is not in need of this form of unity and feels that he has become successful in the arena of his own life and has reached his goals, then all of the relations that united him with others – which were all based on political motives – will be turned into differences and disputes.
Never would a Muslim – one who has true faith in One Allah and the Day of Judgement and who believes in the governance of justice and equality and who deems it necessary to follow the noble moral traits and the humanistic virtues - be able to become the brother of an atheist who does not believe in Allah (Glorified and Exalted is He) or the Last Day and who feels that ethical teachings and traits are just play-things and considers such teachings as fables.