Shall God allow the reprobate into the Kingdom of Heaven, shall they also be saved? The answer to this is easy, God shall not disavow the sacrifice of His Son Jesus, for those that have gone after other gods, and have refused His word. In other words multitudes shall be cast into everlasting torment.
Who shall judge those that have rejected Christ? Christ shall judge the wicked and reprobate, He shall also judge the righteous, for if the righteous scarcely be saved, what shall the end of the unrighteous be?

In the Gospel of Jesus Christ, we deal with a multitude of words, and meanings. We as Christians are commanded by the Lord to read, and study, to show ourselves approved. We must use the Words of God to establish His Kingdom on earth. Also we must use words to communicate the truth to all that will listen. A reprobate mind shall lead to utter destruction, and an after life of pain and suffering.

As it is written; “A word fitly spoken is like apples of gold in pictures of silver.”
(A word spoken with propriety, opportunely, and suitably to the occasion, is as much in its place, and as conspicuously beautiful, as the golden fruit which appears through the apertures of an exquisitely wrought silver basket.) (Pro 25:11.)

A reprobate mind; persons cast away or rejected because they have failed to make use of opportunities offered them. (1Co. 9:27; 2Co. 13:5-7.)
To disapprove with detestation or marks of extreme dislike; to disallow; to reject. To abandon to wickedness and eternal destruction.

To abandon to his sentence, without hope of pardon. Abandoned in sin; lost to virtue or grace.
We must all understand, that no matter what men teach, as the truth, there is an all powerful God that hates sin, and unrighteousness. Men shall be lost, be given over to Satan for the destruction of the flesh, and also the spirit. This is scripture and cannot be denied, or misunderstood.

We see the unrighteousness of man on a daily basis. Wars, rumors of wars, murder, rape, incest, revolts, and human sacrifices. But not all reprobate minds come from those that violate mankind, many are every day people, that raise a family, do no harm to anyone, work hard, and love life, there are also reprobates among them.

This definition works well with these types of people; “persons cast away or rejected because they have failed to make use of opportunities offered them.” The opportunity's offered here, concern the opportunity to accept Gods plan of Salvation to anyone that will, accept Jesus Christ as His Son. For no man can ascend to God except he first come to Christ.

Let us read Titus 1:15-16; “ Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.
They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.”
Without Christ, there are no good works.

The works we are to be judged on, shall be works for God, or the works, done for Satan. No matter how good people believe that you are, no matter how much you give to the poor, no matter how well you live your life, without acceptance of Jesus, as Lord and Christ, your works shall not be counted as righteousness.

As we see here; “defiled (Made dirty, or foul; polluted; soiled; corrupted; violated; vitiated.) and unbelieving(Infidel; discrediting divine revelation, or the mission, character and doctrines of Christ.) is nothing pure.” both the defiled and unbelieving are counted as sinners.

I must give you the definition for Pure; “Free from moral defilement; without spot; not sullied or tarnished; incorrupt; undebased by moral turpitude; holy.
Thou art of purer eyes than to behold evil. (Hab 1. Prov 20.)
Genuine; real; true; incorrupt; unadulterated; as pure religion. James 1.
Free from guilt; guiltless; innocent. Disinterested; as pure benevolence. Chaste; Free from vice or moral turpitude. (Titus 1.)
Free from any thing improper; as, his motives are pure.”

How long shall God deal with mankind, how long shall He suffer rejection of any man, how long shall Gods call for repentance be ignored, before a man is lost forever?
The Bible tells us that Gods Spirit shall not always strive with man.
When the spirit calls a man to repentance, this opportunity must be accepted, for there is no guarantee that there will be another call. For once a man refuses the truth, or a man falls back from grace, there is no more sacrifice for sin. We are accountable each day for our thoughts and actions, God will judge.

Here is the end of the matter; “For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet.”

“And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
Being filled with all unrighteousness, fornication, wickedness, covetousness, maliciousness; full of envy, murder, debate, deceit, malignity; whisperers,
Backbiters, haters of God, despiteful, proud, boasters, inventors of evil things, disobedient to parents,
Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:
Who knowing the judgment of God, that they which commit such things are worthy of death, not only do the same, but have pleasure in them that do them.” (Rom 1:26-32.)

They are all grievous revolters, walking with slanders: they are brass and iron; they are all corrupters.
The bellows are burned, the lead is consumed of the fire; the founder melteth in vain: for the wicked are not plucked away.
Reprobate silver shall men call them, because the LORD hath rejected them. (Jer 6:28-30.)
Think upon these things and warn all that judgment is coming to all. Ars.

(Ref; Webster,TSK.)