Well you did mention Judas. Everyone thought he was a genuine believer doing the good works that Jesus instructed. And then he betrayed the Lord. The antichrist will pretend for a while too, but those who belong to God won't be fooled. The antichrist will fool shallow Christians but not the true Church.
The antichrist is ABSOLUTELY NOTHING like the True Christ.
On the contrary, he is the most profound polar opposite in all of creation.
Judas is THE Satan-man in of all history up to that point. Goliath is a profound Satan-man.
Furthermore, Judas the deceiver was completely UNDETECTABLE by any mere man, including the 12 Apostles.
However, Jesus God literally saw Satan enter Judas at the dipping of the sop, as nothing is hidden from the eyes of the Savior.
Jesus then COMMANDED Satan-Judas to proceed with his folly aka DELIVERING (***not betraying***) God to the Romans and Jews.
Jhn 13:27
And after the sop Satan entered into him. Then said Jesus unto him, That thou doest, do quickly.
"The lie", the greater Judas, the greater Goliath will be the most wicked, evil entity in all of creation.
Which is one of the reasons why we preach to every creature so that they never see his hour.