Hazrat Imam MahdiAS revived the religion of Islam to its pristine state with the message to worship Allah swt with ardent love and devotion.
The love of Allah swt [Ishq-e-Ilahi] is the foundation of religion. Believing with out love for Allah swt is tantamount to polytheism [shirk].
Divine love is achieved through Dhikrullah and both are obligatory as per the holy Quran.
Divine love and Dhikrullah are directly proportional to each other, increase in one increses the other yet non-Mahdavis fail to admit Dhikrullah [Remembrance of Allah swt] as obligatory deed despite clear and numerous Quranic commands. Both, love of Allah swt and remembrance of Allah swt are part of perfection of religion [Ikmal-e-Deen].