It is not for normal human beings to learn anything relating to Kalki avatar. What could be the interest of a nursery student knowing anything relating to a Nobel laureate?
Kalki avatar born a normal human being would slowly manifest supernatural powers exercising which he would steer the present humanity out of utter chaos. The jnana wisdom contained in Bhagavad Gita would come to his rescue all the time.
Materialism dominates the society of today. Mounted with wisdom of Bhagavad Gita Kalki avatar would effectively impart to ailing humanity merits of following path of spirituality than religious practices (rituals) that led nowhere.
Due to teachings of Bhagavad Gita imparted by Kalki avatar the outlook of society would change from negative to positive. The glass half empty would now appear half filled. A drastic change in the behaviour of mankind would be observed. But there is one lacuna.
Hard-core terrorists, thinkers, so-called religious preachers would not be willing to change. On altar of truth such people have to be sacrificed. To save millions from misery, if a few are sacrificed then no sin is committed as per Lord Krishna in Bhagavad Gita.
To re-establish Dharma (righteousness) mother earth demands sacrifice of 1200 million people worldwide. Only then full cleansing of the society is possible. To eradicate untruth, unethical practices immorality from the society a ruthless administrator like Kalki avatar is an absolute must.
In times of Kalki avatar mankind would finally realize the pearls of wisdom that lay hidden in Bhagavad Gita. Instead of indulging in negative religious routines of life mankind would finally indulge in spirituality all the time to reach state of self realization, god realization.
The entire show of Kalki avatar would be a one-man show, a one-man army. Still, mounted with power of truth and only truth, this crusader of truth would finally win war of dharma.