Fellow Muslims are like one body. If one limb hurts, then the whole body feels it. And want the sore part to be healed immediately.
In a hadith from Nouman ibn Bashir (may Allah blesses him), that the Messenger of Allah (ﷺ) says:
مثل المؤمنين في توادهم وتراحمهم وتعاطفهم، مثل الجسد إذا اشتكى منه عضو تداعى له سائر الجسد بالسهر والحمى
“The believers in their mutual kindness, compassion and sympathy are just like one body. When one of the limbs suffers, the whole body responds to it with wakefulness and fever” [al-Bukhari and Muslim].
In this hadith, the Prophet (ﷺ) makes an analogy of the believers with one body. Which describes solidarity, harmony and endearment. Like when one limb feels tired or sore, the whole body will feel a feeling of discomfort.
So let us become Muslims who care more about fellow Muslims, even though they are of different ethnicities and countries. We feel the pain they feel. And help heal them as we want to be free from pain.
Help others in bad times and others will help you in your bad times. $5 to give: ussunnah.org/orphans