The Wilayah of Ali ibn Abi Talib (as) is one of the most precious bounties Allah (swt) has bestowed upon us. Wilayah of Ali ibn Abi Talib (as) is the foundation of Islam as the hadth says:

Imam Abu Ja'far(as) has said, ‘Islam is based on five principles. It is based on Prayer, Charity (al-Zakat) Fasting, Hajj and al-Wilayah (Divine Authority of ‘A’immah). The call to none of the other principles has been so emphatic as it has been to al-Wilayah.’”

Al-Kafi volume 2, Chapter 10, Tradition 1

In yet another tradition, Imam Mohd Baqir (AS) says:

“The foundation of the religion is the love of Ahlulbayt (AS) and the love of their lover and dissociating from their enemies is included in their obedience.”

Ref: Al- Kafi Vol 2 Pg. 18

Hence we call people to establish Wilayah of Ali ibn Abi Talib (as) by loving the Ahlul Bayt (as) and by staying aloof from the enemies of Ahlul Bayt (as).