Yes, novelty. Cephas was not a manifest heretic. St Paul was not rebuking him for a heretical stance.
The material point is that he resisted a Pope who was in error. To resist Bergoglio’s writings and utterances contra the Deposit of Faith is merely to imitate the example of St. Paul (and is in complete opposition to reliance on private judgment). Labeling those who strive to follow St. Paul’s example in defending the Faith against papal errors “hypocrites” is, in essence, an attack on the Body of Christ.
An example of true hypocrisy is the sedevacantist habit of trotting out St. Bellarmine as a voice of authority, yet rejecting his opinion that it would be licit to resist, but illicit to “judge, punish or depose” a pontiff, since his only superior is God.