How will Judas be judged? He helped fulfill the sacrifice of Christ. Is it like he never existed?
Your question is good, and depending on the question behind the question there are several ways to answer.
POSSIBLE UNDERLYING QUESTIONS
1. Are you referring to his suicide?
2. Are you referring to his betrayal of Jesus?
3 Are you referring to the possibility that he was indeed saved, but nevertheless used by Satan?
In reverse order, I answer .There is nothing in Scripture that definitively states if Judas was or was not a believer in Jesus Christ. Therefore to build a question on an unsure premise is committing a logical fallacy called "begging the question". I do not accuse you of logical error here, but I am stating the nature of the question so we can get to an answer, OK?
The second part of question 3 is asking about the possibility of a believer can be influenced by Satan. Since the answer is affirmative for a non believer, I will not discuss that further.
Luke 22:3 Then entered Satan into Judas surnamed Iscariot, being of the number of the twelve.
From this, there can be no doubt from Scripture that Satan used Judas like a tool to betray Judas. On what ground did Satan enter Judas? No one knows, and i am reluctant to speculate or to scare you. But we have to look at another question and that is to ask if a Christian can be tool by Satan. Scripture answers that affirmatively:
Matthew 16:22 Then Peter took him, and began to rebuke him, saying, Be it far from thee, Lord: this shall not be unto thee.
23 But he turned, and said unto Peter, Get thee behind me, Satan: thou art an offense unto me: for thou savourest not the things that be of God, but those that be of men.
There is no doubt that the disciple, and soon-to-be Apostle was saved, so how do we account for the sharp rebuke of Jesus? You can make it into a metaphor, allegoriize it, or accept it as truth. Since the first two possibilities actually destroy Scripture (Jesus said Scripture cannot be broken) the first two are not for the Bible-believing Christian. Therefore it is then true that Satan used the body of Peter to utter something contrary to the plan of salvation created before the beginning of the world. In my mind's eye, I imagine Jesus saying that rather forcefully, and not as calmly as a news reader in cable TV or on news radio might do.
QUESTION 2
That seems to be asking if there is any sin done against Jesus is so heinous as to be unforgivable. Surprisingly, the answer is "no". In our prior, unredeemed life we sinned when we gave God the Father a "last name" or we used the name of our Savior as a swear word. Truth be told, some of us are still beset by that old habit.
But Jesus said that there was only one sin hat is unforgivable, and that is blasphemy against Holy Spirit. That is another discussion for another time; suffice it to say that because you are indeed a Christian, that does not apply to you.
QUESTION 1
Indeed by definition, suicide is self murder. And there are several passage in Scripture that tell us that murderers will not inherit the Kingdom of God. But does that then mean that self murder is unforgivable? Since Jesus stated tha there is only ONE unforgivable sin, I am believing that the act of murder or self-murder is forgivable; I also believe that suicide is often the result of depression because it is surely NOT a rational action.
What then is the answer?Lets let Scripture speak and not opinion.
John 10: 26 But ye believe not, because ye are not of my sheep, as I said unto you.
27 My sheep hear my voice, and I know them, and they follow me:
28 And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
29 My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand.
30 I and my Father are one.
Verse 30 is the authority by which Jesus makes the statements in the previous verses, and it is also the reason why the good Jews wanted to stone Him for blasphemy because (in their eyes a mere mortal) Jesus claimed equality with God.
To make this short, I cut to the chase. Only the sheep of Jesus hear His voice, and follow Him. Jesus said very emphatically that NO PERSON, NO SPIRITUAL BEING indeed NOTHING shall be able to pluck the believer from the hand of God. Notice it is said twice, so I guess Jesus REALLY means it, huh?
It is also stated in the OT as well
Isaiah 49:16 Behold, I have graven thee upon the palms of my hands; thy walls are continually before me.
In case you did not know, that "palm engraving" is another word for a tattoo. Therefore as a believer, you are forever in the hands of God, and if Judas was a believer, then so also is he.