A mother has an understanding of intense compassion towards her child who is completely unaware and defenseless in the face of the dangers around. Allah makes this feeling of compassion He bestowed on mothers means for the protection of people from the moment they are born. And that feeling of compassion in humans is a manifestation of Allah's name; All-Merciful, Most-Merciful.
Allah had created this feeling of intense compassion, mothers feel towards their children, also in animals in a similar manner. Science is observing the self-sacrificing acts of animals in protecting their whelps in awe and admiration. Of course Allah had created various lessons and examples for man in such behaviors of animals.
There is a lot of wisdom in this feeling of compassion Allah inspires in the hearts of humans. Allah takes a being that has no information about the world; who doesn't know what good-bad, right-wrong, safe-dangerous is; who is incapable of protecting himself; who is unaware of his needs and how to satisfy those needs, under complete protection by means of this "motherly compassion".
And that "motherly compassion" is an important measure and example for the understanding of compassion people should feel for each other. Just like a mother who cannot show interest, concern and compassion to a defenseless child only from time to time and leave him alone "to take care of himself" at other times; just like her giving the priority to her child everywhere at all times; this behavior should be the foundation of an ideal understanding of compassion. The compassion people feel for each other should be just like a mother's unflinching and measureless self-sacrifice for her child; just like her putting her child's comfort, peace and needs above her own. The mercy people feel for each other should be as powerful as a mother's, who no matter how hard the conditions she is in are; even in her most tired, sleepless, weakest, most ill, most intense and busiest times; never compromises from this compassion and diligence.
However such a powerful understanding of compassion is of course a feeling that can only be lived with the "fear of Allah". It is Allah Who, for the protection of children, guides mothers by inspiring this feeling of compassion towards their children in them. Yet in order to sustain this understanding of compassion for a lifetime and to forward this to all humans, this person should fear Allah and act in compliance with the morality of the Qur'an.
People who do not have faith, can only display such a powerful morality of compassion towards people with whom they have a connection of interest; that is towards people who they think will provide an interest for them now or in the future. And they can only sustain this temporarily.
Muslims on the other hand can live compassion and mercy as a part of their personalities all through their lives. They adopt the "motherly compassion" Allah shows us as an example, as a trait of their characters. They adopt a manner towards Muslims around them that is much more protective than the diligence a mother shows to her child. They love and respect their Muslim brothers as their friends, companions and families and they never fail in respect for them. However as they act compassionately; they adopt a meticulous morality just like a mother satisfying all the needs, distress and expectations of her child even before they are voiced. They put others' problems, needs, troubles ahead of their own. They never make concessions from protecting their Muslim brothers even in most difficult times.
However the "motherly compassion" should of course not be perceived as putting that person in the place of a child and assuming a more experienced, wiser, more knowing manner towards that person. This understanding of compassion is a morality that is displayed completely in a humble and modest manner. Sometimes the person to approach with the compassion of a mother might be senior than that person himself. The important part here is to be in a very self-sacrificing and tactful manner in protecting and coddling that person and in satisfying his needs with great precision, without making it felt.
This "motherly compassion" seen in Muslims is a very important indication of the love devout people feel for each other. That is because only a person who loves solely for the approval of Allah without getting in any kind of expectation, can show such a high morality. Consequently, showing this morality continuously -without discriminating any person- towards all Muslims is at the same time an important indication which shows that person is a sincere believer.
In the Qur'an, Allah revealed the following about the understanding of compassion Muslims should show to each other:
Do not direct your eyes longingly to what We have given certain of them to enjoy. Do not feel sad concerning them. And take the muminun under your wing. (Surat Al-Hijr: 88)