Let us read from the book of Mark
The Son of man indeed goeth, as it is written of him: but woe to that man by whom the Son of man is betrayed! good were it for that man if he had never been born.
So, let's get this straight, shall we? Jesus has to die. In fact, that's the whole backing to the Xian religion. If Jesus doesn't die, then no human/deity/blood sacrifice is made to allow god to allow himself to convince himself to forgive us for the sins that we commit by being made that way by god. Anyway, Jesus dying is a good thing.
Jesus has to be turned over to the authorities so that he can be tortured, because apparently that's a good thing too. god requires lots of blood, so Jesus needs to be sacrificed.
In order for that to happen, someone needs to betray Jesus. If someone doesn't betray Jesus, then none of the sacrifice stuff happens and Xianity has no reason to exist.
But, that person, Judas, that betrays Jesus, "woe to that man...good were it for that man if he had never existed." What? Judas does Xians a favor! Judas makes it possible for Xianity to have a reason to exist. Judas makes it possible for god to allow himself to forgive us, since he can sate himself with his own divine blood. Judas should be a hero. But, what does he get for setting the whole thing in motion? "Woe to that man." I can only surmise that Judas gets hell for doing what is a good thing according to the Xian tradition, a necessary thing.
Xianity is full of contradictory ideas such as this, which is why I'm surprised that people take it seriously.