How Do demons Exist and How they multiply

FIRST of all let me say Bro Eli's teachings are very profound and I love it that every question thrown at him as a biblical bases, hence the slogan

//Ask BRO Eli the bible will answer//

And I Will run this review in accordance with to the scriptures read out to us. ..

God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands;
Acts:17:24

According to this scripture and bro Eli's teachings It is God who created all that we see today and without which nothing would exist as it is written
All things were made by him; and without him was not any thing made that was made.
John:1:3 we see it that all that we see was created by God, including Satan but the truth is that he wasn't Satan From the beginning infact bible describe him as the morning star up untill the day Pride entered his heart.

It's from there that he also cast down alongside other angels who john his side to rebel against God, the bible says there was a war in heaven.

How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations, For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north, I will ascend above the heights of the clouds; I will be like the most High,
Yet thou shalt be brought down to hell, to the sides of the pit. isaiah:14:12

this is what transpired When pride Overwhelmed him, and he was cashed down with other angels, And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
Jude:1:6 that's how they multiply ehe. The. Are now convinced by others then of they joined they.multiply through that pattern..

Finally

And another angel came out of the temple, crying with a loud voice to him that sat on the cloud, Thrust in thy sickle, and reap: for the time is come for thee to reap; for the harvest of the earth is ripe.
Revelation:14:15