He chose Judas as a Disciple for a specific purpose, just as he chose the rest for their specific purpose.
NASB Luke 22:21-22
"But behold, the hand
of the one betraying Me is with Mine on
the table. 22 "For indeed, the Son of
Man is going as it has been determined;
but woe to that man by whom He is
betrayed!"
NASB Mark 14:17-21
"When it was evening
He came with the twelve. 18 As they
were reclining at the table and eating,
Jesus said, "Truly I say to you that one
of you will betray Me -- one who is
eating with Me." 19 They began to be
grieved and to say to Him one by one,
"Surely not I?" 20 And He said to them,
"It is one of the twelve, one who dips
with Me in the bowl. 21 "For the Son of
Man is to go just as it is written of Him;
but woe to that man by whom the Son of
Man is betrayed! It would have been
good for that man if he had not been
born."
NASB Matt 26:20-25
"Now when evening came, Jesus was reclining at the table with the twelve disciples. 21
As they were eating, He said, "Truly I say to you that one of you will betray Me." 22 Being deeply grieved,
they each one began to say to Him, "Surely not I, Lord?" 23 And He answered, "He who dipped his hand
with Me in the bowl is the one who will betray Me. 24 "The Son of Man is to go, just as it is written of Him;
but woe to that man by whom the Son of Man is betrayed! It would have been good for that man if he had not
been born." 25 And Judas, who was betraying Him, said, "Surely it is not I, Rabbi?" Jesus said to him, "You have said it yourself."