But what does this love and enmity exactly mean? Loving for the sake of Allah means to love Allah and to show loyalty to Him by following His Shariah. It means to love all that is good and permissible in the Quran and Sunnah. This type of love requires one to defend Allahs deen and to preserve it. It is to love those who are obedient to Allah and to defend and assist them. These are the party of Allah. Enmity for the sake of Allah signifies showing anger towards those who oppose Allah, His Messenger (sallallahu alaiyhi wa sallam), His deen, and the believers. It is to struggle and fight against them in order to uphold and spread the way of Allah and His Messenger (sallallahu alaiyhi wa sallam). There is a brilliant example of this in Ibrahim (alaiyhis-salaam), as narrated by Allah in the Quran:
There is a good example for you in Ibrahim and those with him when they told their people: Surely, we disassociate ourselves from you and all that you worship beside Allah. We have done with you. And there has arisen between us and you enmity and hate forever until you believe in Allah Alone. (Suratul Mumtahanah 60:4)
Al wala wal bara requires one to ally oneself with Allah, His Messenger (sallallahu alaiyhi wa sallam), and the believers wherever they are found against the disbelievers even if it is against their own relatives. We see this in the example of the Prophet (sallallahu alaiyhi wa sallam), who fought against his own relatives and his own clan, all for the sake of Allah.