Since this is the end of the world, it seems to me that this is speaking of the great white throne judgement.
This is a reasonable conclusion; however, not the only one. The world is translated from age
aionos, not
cosmos. They are interchangeable in many cases, such as in Heb 1, where the God makes the ages/worlds by His Son. There is now only one world that will end, but there are more than one ages, that have and will end in this world.
The only time the end of this physical world is prophesied, is not in Matthew 24, which is the end of this age with the Lord's return. But rather in 2 Peter 3, when this heaven and earth will be burned away with fire. The judgment at that time can only be at the GWT.
Therefore, the separation between wheat and tares can well be made by God
twice: First at the Lord's return with the first resurrection, and then at the GWT, when the rest of the dead live again.
The tares being burned in the fire seems to be a reference to the lake of fire which is the second death.
Once again, it can be first at the end of this age by the Lord's return, and again at the end of this world by fire and melting heat. However, Jesus informs us that specifically
now in this age, there are both wheat and tares awaiting separation. That separation certainly is with His second coming, where He severs His good and faithful servants from the evil and unfaithful.
Unless there is Scripture specifically saying, that those bad believers and servants remain on earth, then the severing of tares from wheat can only be at the GWT. In that case, I would be corrected in part, and acknowledge the wheat and tares are not at the Bema judgment.
However, there is a problem with 'tares' in Matthew 13 during the Millennium:
Mat 13:39 The enemy that sowed them is the devil; the harvest is the end of the world; and the reapers are the angels.
The devil will not be sowing anything
on earth during the Millennium, because he will be shut up in the bottomless pit. Therefore, the those tares must be at this time, and severed at the Lord's return, when the angels will gather the wheat to meet with the Lord in the air, and the tares will be gathered and burned with fire
in hell.
Everyone that goes into the millenium gets the same treatment, a forced righteousness (sort of), but not everyone responds by accepting Jesus. There are those that will still reject Him and rise up against Him at the end and will be consumed with fire from Heaven.
Very true. The Lord's millennium will be His greatest harvest of souls to Himself, in more abundance than all the thousands of years going before.
And when His reign expires, the devil will be loosed with liberty to round up the enemies of the Lord for one last battle on this earth. It will take however long to gather against the Lord, but in in day it will be quickly destroyed by fire of the Lord from heaven. A much larger repeat of Sodom and Gomorrah.