Apparently, according to Jesus, some who are in the Lord's kingdom now will be removed in the end due to their walking in iniquity. They should have stopped living in sin, but they kept on sinning
Galatians 5:16 This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
24 And they that are Christ's have crucified the flesh with the affections and lusts.
2 Timothy 2:19 Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, Let every one that nameth the name of Christ depart from iniquity.
Matthew 7:21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.
2 Timothy 3:4 highminded, lovers of pleasures more than lovers of God;
5 Having a form of godliness, but denying the power thereof: from such turn away.
7 Ever learning, and never able to come to the knowledge of the truth.
If they did not stop sinning when they confessed Christ they were never part of the Lord's kingdom at all to be removed.
2 Peter 2:20 For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.
21 For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them.
Romans 11:20 Well; because of unbelief they were broken off, and thou stands by faith. Be not highminded, but fear:
21 For if God spared not the natural branches, take heed lest he also spare not thee.
22 Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.
Those that accepted the truth if they go back to sinning and do not correct it then they will be removed.
But as soon as they sin and do not correct it they are not in the kingdom unless they correct it.
Many people did not accept the truth when they confessed Christ enjoying sin having the attitude they cannot stop sinning.
But the Bible says a Spirit led person will not sin.
A person will not be led of the Spirit until they hate sin, and do not want sin, and believe the Spirit will help them.
But some people will not let go of the flesh.
But it should be common sense if God gives us His Spirit then we would have the power to overcome sin.