Why do people not realize that the "Kingdom OF heaven"?

Because most have been conditioned as children to believe the go to heaven/go to hell paradigm instead of the Bible.

Mt. 10:7 Because Jesus Christ said, " The Kingdom of heaven is at hand."

Whatever gets you to perceive the REALITY without changing its purpose objective

Just be careful, that you don't eschew its meaning...

The KJV Bible says it in many places, and keep in mind that the kingdom of God is within you,

operating the Salvation Of Jesus Christ within your heart.

For Jesus Christ said, "without HIM you can do nothing."

And who is an antichrist? 1st John ch.2:22" Who is a liar but he that denys that Jesus is The Christ?

He is antichrist, that denys The Father and The Son."

An Antichrist = 1st John 4:3 "And every spirit that confesses not that Jesus Christ is come in the flesh IS NOT OF GOD: and this is that spirit of antichrist, whereof ye have heard that it should come; and EVEN NOW ALREADY IS IT IN THE WORLD."

"If you believe not that I AM HE, The Messiah, you shall die in your sins." Jesus Christ.

And why, then live in a Material World, when we will be spiritual? The Kingdom of Heaven is in a totally difference place, with a totally different surroundings.. there is no need for food, so why have food available? No pain, no hunger, no need for clothes, we will not have bodies....

Why then, the material world?

We are to seek first the Kingdom of the heavens, not heaven, as this is a

plural word. Eventually, it is moved here, but we are to seek the ways

that are practiced outside of this realm.

at death our soul goes to heaven to await the resurrection of our body

once our body is resurrected we are in heaven until the end of the tribulation when jesus returns to earth to kill the antichrist and his armies.

we return with him and reign with him on earth during the 1000 year reign

after the 1000 year reign jesus destroys the old earth and creates a new one we then live on the new earth for eternity