If the bible said Jesus had known from the beginning which of them did not want hamburgers and who wanted French Fries.
That doesn't mean the guy who wanted French Fries doesn't want a hamburger.
That's why we use words like NIETHER and NOR rather two "who's"
BELIEF, Trust, obedience, and LOYALTY are different things.
I could connect belief and obedience together that disqualifies everyone including the Eleven as apostles.
Belief doesn't always mean acknowledge their existence.
Jesus calling out a DEVIL rather then a Atheist, gives you even a worst case.
Judas believes, just like Satan believes Jesus is the Christ. A DEVIL believes in GOD.
A Devil has been IN THE PRESENCE of God. There is not ONE DEVIL that doesn't believe in God.
If Judas was NEVER a apostle Jesus would have said "have I not chosen eleven"
Let me give you an example:
Matthew 7
22“Many will say to Me on that day, ‘Lord, Lord, did we not prophesy in Your name, and in Your name cast out demons, and in Your name perform many miracles?’
Matthew 12
24But when the Pharisees heard
this, they said, “This man casts out demons only by Beelzebul the ruler of the demons.”
25And knowing their thoughts Jesus said to them, “Any kingdom divided against itself is laid waste; and any city or house divided against itself will not stand.
26“If Satan casts out Satan, he is divided against himself; how then will his kingdom stand?
27
When you reconcile both these verses it should be clear that those of Matthew 7 indeed had the LEGIT belief and authority of Jesus Christ. and did GOOD THINGS in the name of Jesus Christ.
They are not casting out devils by the devils power else as Jesus pointed out it would be contradictory and Satan is dived against himself.
If they were NON-believers in the sense of existence and trust they wouldn't believe they could cast out demons or do miracles to begin with.
If you think about it the entire point of Matthew 7 verse is precisely AGAINST Once Saved Always Saved.
22“Many will say to Me on that day, ‘Lord, Lord, did we not prophesy in Your name, and in Your name cast out demons, and in Your name perform many miracles?’
23“And then I will declare to them, ‘I never knew you; DEPART FROM ME, YOU WHO PRACTICE LAWLESSNESS.’
Jesus already laid out that the devil can't give authority for devil casting out devils. Because if he does he will mess himself up "kingdom divided". On the devil's boat the crew are not allowed to have guns.......because they'd kill each other and the boat would sink right away.
So "UNBELIEVERS" being under the authority of Satan can't cast out or do miracles.
Its BELIEVERS who are under the authority of Jesus who cast out demons and do miracles.
They fall because they practice lawlessness. They are fallen they don't have the authority of Jesus, they cannot do miracles or cast out demons.