This is purely a rational reality...
This is purely a rational reality, which is also testified in the Quran: You will not find any people who believe in Allah and the Last Day, but love those who opposed Allah and His Apostle, even though they were their fathers, their sons, their brothers, or their kindred... (58:22) Thus, true love is always accompanied with true hate, and one does not really love Ahl al-Bait (PBUT) unless he also becomes a hater of their enemies.
Several authorities narrated: [^1] Tafsir, Ali Ibn Ibrahim al-Qummi, vol. 2, pp. 171-172; Ta'wil al-Ayat al-Dhahira, p. 439; Bihar al-Anwar, vol. 31, p. 5. [^2]al-Amali, al-Saduq, p. 605, Hadith 8; Wasa'il al-Shia, vol. 16, p. 180, Hadith 21292; Bihar al-Anwar, vol. 66, p. 237, Hadith 3. Imam Baqir (PBUH) said: "...
Is religion other than love and hate?" He (PBUH) then recited, "But Allah has made you love the Faith and has made it beautiful in your hearts, and He has made you hate disbelief, wickedness, and rebellion. Such indeed are those who grow in righteousness," (49:7) and "They love those who migrate towards them," (59:9) and "Say, 'If you truly love Allah, follow me; Allah will love you and forgive you your sins.
For Allah is forgiving, most merciful.'" (3:31)[^1] The last quoted verse in the above Hadith shows that even following Allah's commandments is the result of loving Allah. Fudhail Ibn Yasar has also narrated a similar Hadith from Imam al-Sadiq (PBUH) with the difference that the Imam (PBUH) said: "Is faith other than love and hate?"[^2] Another interesting tradition states that the religion is naught but love.
This is consistent with the above-quoted traditions since hating the enemies of Allah should only be for the sake of loving Allah. Thus, we come to our previous conclusion that hating is not an independent issue. Rather it is a natural resultant of true love. In other words, having true love alone for Allah rationally implies having hatred against His enemies. In fact, hating the enemies of Allah is a duty and is of the best deeds.