Angel 3 said:Actually, the NT mentions that we will help God judge the unrighteous and even angels (1 Corinthians 6:2 - 3). So if a pastor or a group of believers make a valid judgement that someone is being unrepentantly immoral, and needs to be expelled from the Church, then it logically follows that God wouldn't allow that unrepentant person into His kingdom neither.
Matthew 7:1-2
1"Do not judge, or you too will be judged. 2For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you.
Deuteronomy 1:17
Do not be afraid of any man, for judgment belongs to God.
2 Peter 2:9-11
... the Lord knows how to rescue godly men from trials and to hold the unrighteous for the day of judgment, while continuing their punishment. 10This is especially true of those who follow the corrupt desire of the sinful nature and despise authority.
2 Peter 3:15-16
15Bear in mind that our Lord's patience means salvation, just as our dear brother Paul also wrote you with the wisdom that God gave him. 16He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.
Perhaps you should rephrase your objection.