Is the phrase "Al-Wala wal-Bara" (loyalty and disavowal) an idea that originated with the Khawarij and is not part of the comprehensive understanding of Islamic creed?

Al-Wala' wal-Bara' (Loyalty and Disavowal) is a fundamental principle of Tawhid (monotheism), established in both its wording and meaning. Numerous verses attest to it, such as the Almighty's saying: ﴿O YOU WHO HAVE BELIEVED, TAKE NOT THE JEWS AND THE CHRISTIANS AS ALLIES. SOME OF THEM ARE ALLIES OF OTHERS. AND WHOEVER OF YOU TAKES THEM AS ALLIES – INDEED, HE IS [ONE] OF THEM. INDEED, ALLAH DOES NOT GUIDE THE WRONGDOING PEOPLE﴾ (Al-Ma'idah/51), and His saying: ﴿AND [MENTION, O MUHAMMAD], WHEN ABRAHAM SAID TO HIS FATHER AND HIS PEOPLE, "INDEED, I AM DISASSOCIATED FROM THAT WHICH YOU WORSHIP, EXCEPT FOR HE WHO CREATED ME; AND INDEED, HE WILL GUIDE ME"﴾ (Az-Zukhruf/26-27).

Its meaning is to love the believers and show loyalty to them, and to hate the disbelievers, show enmity towards them, and disavow them and their religion. However, hating them and showing enmity towards them does not mean oppressing them or transgressing against them if they are not at war [with Muslims]. Rather, its meaning is to hate them in the heart, show enmity towards them in the heart, and not take them as close friends, while still treating them well and debating with them in the best manner.

The Khawarij do not have exclusive claim to the principle of "Al-Wala' wal-Bara'." However, those who excessively pronounce takfir (excommunication) in this era might cling to this concept, and this is due to a flaw in understanding the issue and its essence.