You're not interpreting scripture with scripture here. Again...
Luke 8:20 And it was told him by certain which said, Thy mother and thy brethren stand without, desiring to see thee. 21 And he answered and said unto them,
My mother and my brethren are these which hear the word of God, and do it.
Matthew 12:47 Then one said unto him, Behold, thy mother and thy brethren stand without, desiring to speak with thee. 48 But he answered and said unto him that told him, Who is my mother? and who are my brethren? 49 And
he stretched forth his hand toward his disciples, and said, Behold my mother and my brethren! 50 For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother.
Jesus made it clear that His brethren are those who obey God's word. His brethren are His followers. That includes all of us.
Matthew 25:34 “Then the King will say to those on his right, ‘Come, you who are blessed by my Father; take your inheritance, the kingdom prepared for you since the creation of the world.
The sheep will inherit the kingdom of God. But, you believe they will inherit the kingdom as mortals. That contradicts what Paul taught here:
1 Corinthians 15:50 I declare to you, brothers and sisters, that flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable.
As Paul taught, people with mortal "flesh and blood cannot inherit the kingdom of God", but you say they will.
Where does it say that? The word "nations" is not a good translation of the Greek word "ethnos" in that verse. The word can also mean people in general, heathen or Gentiles. In this case, it is referring to people in general. All people will be judged at the same time as is taught in other passages like this:
Matthew 13:40 “As the weeds are pulled up and burned in the fire, so it will be
at the end of the age. 41 The Son of Man will send out his angels, and they will weed out of his kingdom everything that causes sin and all who do evil. 42 They will throw them into the blazing furnace, where there will be weeping and gnashing of teeth. 43 Then the righteous will shine like the sun in the kingdom of their Father. Whoever has ears, let them hear.
Jesus will return at the end of the age (Matt 24:3) and He indicated that is when the righteous will inherit "the kingdom of their Father" and the wicked will be cast into the fire, which lines up with what He taught in Matthew 25:31-46.
There is only one judgment day as we can see here:
Acts 17:30 In the past God overlooked such ignorance, but now he commands all people everywhere to repent. 31 For
he has set a day when he will judge the world with justice by the man he has appointed. He has given proof of this to everyone by raising him from the dead.”
Is "the kingdom prepared for you from the foundation of the world" not the kingdom of God? Of course it is. So, I see no basis for trying to say that the kingdom being inherited in Matthew 25:34 is a different kingdom than the one Paul referenced in 1 Cor 15:50.