It is a massive problem for premills as far as I can tell.
Jesus doesn't inherit his Kingdom, he Glorifies what he himself established through his death.
Note matt 13 again...,
40 So just as the weeds are gathered up and burned in the fire, so will it be at the end of the age. 41 The Son of Man will send out His angels, and they will gather out of His kingdom all things that offend [those things by which people are led into sin], and all who practice evil [leading others into sin], 42 and will throw them into the furnace of fire; in that place there will be weeping [over sorrow and pain] and grinding of teeth [over distress and anger].
They are gathered out of the already established kingdom for not serving him.
He comes a second time to glorify it....to sit on the throne of his glory as matt 25 : 31- teaches.
The words he has already spoken will judge all the last day yes. Let us force our way in before he comes again.
John the baptist even said...,
- Matthew 3 10 And already the axe [of God’s judgment] is swinging toward the root of the trees; therefore every tree that does not bear good fruit is cut down and thrown into the fire.
His winnowing fork is in His hand, and He will thoroughly clear out His threshing floor; and He will gather His wheat (believers) into His barn (kingdom), but He will burn up the chaff (the unrepentant) with unquenchable fire.”
- Luke 3:17
His winnowing fork is in His hand to thoroughly clear His threshing floor, and to gather the wheat (believers) into His barn (kingdom); but He will burn up the chaff (the unrepentant) with unquenchable fire.”
43
Then the righteous [those who seek the will of God] will shine forth [radiating the new life] like the sun in the kingdom of their Father. He who has ears [to hear], let him hear and heed My words.
You raise good questions, but to be frank, nothing about this is clear with respect to God's Kingdom and the Millennium. God's Kingdom is actually everywhere--it is not just established yet on earth. You may not believe it will even be established on earth at all? You can answer this for yourself?
So let's just assume that whether you're a Premillennialist or not that we both believe the Kingdom of God has not yet reached the apex of its fulfillment, that when Christ comes his Kingdom will, in a more full sense, achieve something better on a New Earth? If so, then how would angels gather the wicked to be burned?
We are told it is at Christ's Coming, so that sounds like it is Armageddon where this "gathering" takes place, indicating it is a pre-Kingdom gathering. The gathering, as such, sounds like it will be *as Christ comes,* instead of *after Christ comes.* The wicked are removed from the earth at that point, to be cast into the Lake of Fire later, *after Christ comes.*
I think the point I'm questioning, therefore, is whether the "gathering of the wicked" takes place pre-Kingdom or post-Kingdom? You say it is post-Kingdom, but I'm not sure the language requires that interpretation?
When are the angels sent out to gather the wicked? It seems like it happens just prior to the Kingdom as part of Jesus' Coming. His Coming, though taking place in an instant, has several things associated with it that requires much longer than an instant. His Coming can be said to involve the entire scope of the Armageddon judgment, including the gathering of nations to Armageddon, even though the Coming itself takes place in an instant.
1 Cor 15.51 Listen, I tell you a mystery: We will not all sleep, but we will all be changed— 52 in a flash, in the twinkling of an eye, at the last trumpet.
So the Coming itself is a flash of lightning, indicating that our transformation to immortality is instantaneous. This is for the purpose of making us able to return with him in the same instant, in my opinion. But what about the angels being sent forth to gather the wicked?
Rev 16.14 They are demonic spirits that perform signs, and they go out to the kings of the whole world, to gather them for the battle on the great day of God Almighty.
Rev 16.16 They are demonic spirits that perform signs, and they go out to the kings of the whole world, to gather them for the battle on the great day of God Almighty. 16 Then they gathered the kings together to the place that in Hebrew is called Armageddon.
This suggests that evil angels are gathering nations and people to war for the battle of Armageddon, which I think is a mobilization to the Middle East, leading to a world-wide nuclear war. But God is also operating to gather people, using His angels, for a different reason.. Here Jesus is talking about God gathering His people to Him spiritually...
Matt 12.30 Whoever is not with me is against me, and whoever does not gather with me scatters.
Matt 13.30 Let both grow together until the harvest. At that time I will tell the harvesters: First collect the weeds and tie them in bundles to be burned; then gather the wheat and bring it into my barn.
All of this appears to be a *spiritual gathering,* with respect to the righteous, and not a physical gathering. People are gathering in devotion to Christ by having the Gospel of truth preached to them. When they receive that truth in their hearts, and obey God's word, they are united with Him. They are "gathered to Him."
So I believe the following is a *spiritual gathering,* appropriating God's People at the Coming of Christ...
Matt 24.31 And he will send his angels with a loud trumpet call, and they will gather his elect from the four winds, from one end of the heavens to the other.
But the gathering of the wicked is a different kind of spiritual gathering, culminating in an actual physical gathering of nations to Armageddon. In effect it will winnow out the wicked from participation in the coming Kingdom of Christ.
They will die, and not be allowed to enter into that Kingdom. And they will not be able to be restored to it, since they will then be committed, at that time, to Eternal Death.
So Jesus, at his Coming, will preside over mankind, and determine, at that moment, how to deal with those so gathered, the righteous spiritually gathered to Christ, and the wicked gathered to Armageddon to oppose Christ. And the wicked he will destroy beyond recovery at Armageddon, at which time he will come. They will die, and not be restored ever. They will eventually be cast into eternal fire.
I don't believe the casting into eternal fire will all be at the moment of Christ's Coming. But the determination at that time is that they are dying with that ultimate judgment in mind, that they are being destroyed from God's Kingdom forever.