Wheat and Tares was strictly a 1st century "phenomena". The apostate Jews (tares) of that time (rejecting Jesus and his apostles") were cast out of the kingdom of Israel.
(Mat 8:11 I tell you, many will come from the east and west to share the banquet with Abraham, Isaac, and Jacob in the kingdom of heaven)
(Mat 8:12 but the sons of the kingdom will be thrown out into the outer darkness, where there will be weeping and gnashing of teeth." )
(Gal 4:30 But what does the scripture say? "Throw out the slave woman and her son, for the son of the slave woman will not share the inheritance with the son" of the free woman. )
Incorrect, the harvest was the end of the Jewish/Israel age.
John warned the tares:
(Mat 3:7 But when he saw many Pharisees and Sadducees coming to his baptism, he said to them, "You offspring of vipers! Who warned you to flee from the coming wrath? )
John said the axe was already laid at the root of the "trees" ready to be drawn back for the felling strike.
(Mat 3:10 Even now the ax is laid at the root of the trees, and every tree that does not produce good fruit will be cut down and thrown into the fire.)
Jesus stated the harvest was already ripe in his day:
(John 4:35 Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest ).
There are no tares in Christ's kingdom, you are either born again or not, in or out.
There is no need to gather any unbelievers out of His kingdom.
Absolutely wrong. The relevant scriptural reference to define the where and when and what of the "harvest" is Joel 3:11 etc.
The eschatology is yet future from today. Not 70 AD, not during the ministry of Christ, not the ministry of the Apostles.
"Hasten and come,
all you surrounding nations,
and gather yourselves there.
Bring down your warriors, O Lord.
12Let the nations stir themselves up
and
come up to the Valley of Jehoshaphat;
for there I will sit to judge
all the surrounding nations.
13Put in the sickle,
for the harvest is ripe.
Go in, tread,
for the winepress is full.
The vats overflow,
for their evil is great.
14Multitudes, multitudes,
in the valley of decision!
For the day of the Lord is near
in the valley of decision.
15The sun and the moon are darkened,
and the stars withdraw their shining.
16The Lord roars from Zion,
and utters his voice from Jerusalem,
and the heavens and the earth quake.
But the Lord is a refuge to his people,
a stronghold to the people of Israel."