The Second Letter of Peter challenges papal claims

Roman Catholicism pretends that the pope is the infallible head of the Church and the first pope was Peter who was appointed by Christ.

The First Letter of Peter was written to believers in Pontus, Galatia, Cappodicia, Asia and Bythynia. It would make sense to address it to the whole Church. But he didn't do that. You would expect a pope to do that.

Peter could not write infallible scripture never mind be an infallible pope.  He praised Lot as a righteous man in 2:7.  Yet when a mob came to his house looking to have sex with alluring angels they thought were ordinary men Lot told them to rape his daughters instead.  The message is that homosexual rape is a bigger sin than heterosexual rape for a man should not have sex with a man.  The excuses that Lot was a man of his time are just excuses.  If the Christian idea that we all know right and wrong is true then Lot was bad.  Peter clearly sets him out as an example though there is nothing edifying in the stories about him.  It is odd that Peter could not use another person as a good role model.   It is a good thing that Peter didn't do canonisations!  Who do today's popes think they are? 

The Second Letter of Peter states that, "I am writing you this second letter" - 3:1. Clearly it alleges that it comes from Peter himself. The letter is riddled with judgment and bigotry and warnings about divine vengeance. Whoever wrote it knew about the first letter. But was the first letter really Peter's only letter? Letters of Paul were lost so why not Peter's? If Peter only wrote one letter then he was not much of a pope! Popes need to write to live up to their claim to feed the flock with correct doctrine.

2 Peter is believed by most mainstream scholars to have been written by somebody pretending to be Peter. Yet it is supposed to be the word of God. If Peter was the pope, could you imagine God inspiring a pseudo-Peter to write the letter? Pseudo-Peter certainly did not think Peter was head of the Church. If he had, he would have had something like this in the letter, "I, Peter, in humble submission to God, am chief among the elders and bishops of the Church". He didn't. It would be an unimaginable omission if Peter was the pope. And especially as we see, the letter warns readers not to be led astray from the security given by faith in the writings of Paul. He is not worried at all about the security lost by those who turn their back on the direction given by the pope. He writes as one whose death is not far off so he wants to give guidance before he goes. He urges the readers to recall what he writes frequently after his departure (1:14,15). Does not sound like he expected another pope to take his place!

This Peter is giving the impression of writing only to people in Pontus, Galatia, Cappodicia, Asia and Bythynia as well as he says, "I am writing you this second letter" - 3:1. And he is not far from death. He was not in Rome. He didn't even include Rome. He would have done had he been there.

First Peter says he is in Babylon and this is the real Babylon or it could be Jerusalem. It is only a guess that he was using Babylon as a code-name for Rome. Babylon is merely a symbol among early Christians for godless city.

Paul urged people not to marry from now on as the day of the Lord was too near so there was no point.

The decades passed and it was realised that the day of the Lord was far off. Some scoffers were asking where the promised day of the Lord is as it was predicted and there was no sign at all of it (3:4).

The author of 2 Peter instead of admitting that Paul was wrong stated that the day of the Lord could come any time tried to make out that Paul never really thought it was going to be that quick. He says Paul taught that the time of its coming was indefinite and wholly unpredictable and taught that we should always be ready just in case. Then he had the nerve to declare Paul to have written scripture - the word of God.

The following text vindictively urges believers to look forward to the day of the Lord despite the destruction it will bring. If Peter was the pope the Church was built on and he wrote these lies then surely Jesus himself was a disgrace for making such a charlatan the head of the Church?
 
2 PETER CHAPTER 3

10 But the day of the Lord will come like a thief. The heavens will disappear with a roar; the elements will be destroyed by fire, and the earth and everything done in it will be laid bare.
11 Since everything will be destroyed in this way, what kind of people ought you to be? You ought to live holy and godly lives 12 as you look forward to the day of God and speed its coming. That day will bring about the destruction of the heavens by fire, and the elements will melt in the heat. 13 But in keeping with his promise we are looking forward to a new heaven and a new earth, where righteousness dwells.
14 So then, dear friends, since you are looking forward to this, make every effort to be found spotless, blameless and at peace with him. 15 Bear in mind that our Lord’s patience means salvation, just as our dear brother Paul also wrote you with the wisdom that God gave him. 16 He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.
17 Therefore, dear friends, since you have been forewarned, be on your guard so that you may not be carried away by the error of the lawless and fall from your secure position. 18 But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be glory both now and forever! Amen.

Read how the author warns against those who distort Paul's writings. He warns that this is extremely dangerous. Surely if he were pope or pretending to be he would say that rejecting his own guidance as the one who stands in the place of Christ as head of the Church is dangerous as well?
 
Paul writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction. Therefore, dear friends, since you have been forewarned, be on your guard so that you may not be carried away by the error of the lawless and fall from your secure position.