There is nothing especially peaceful or loving in the words of 2 Peter.
2 But there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies,....bringing swift destruction on themselves. ..... Their condemnation has long been hanging over them, and their destruction has not been sleeping.
4 For if God did not spare angels when they sinned, but sent them to hell.... putting them in chains of darkness to be held for judgment; ..... if he did not spare the ancient world when he brought the flood on its ungodly people, ... if he condemned the cities of Sodom and Gomorrah by burning them to ashes, and made them an example of what is going to happen to the ungodly; .....to hold the unrighteous for punishment on the day of judgment..... This is especially true of those who ....despise authority (church leaders).
But these people blaspheme in matters they do not understand. They are like unreasoning animals, creatures of instinct, born only to be caught and destroyed, and like animals they too will perish..... These people are springs without water and mists driven by a storm. Blackest darkness is reserved for them.
Or if you prefer you can read the same material in the book of Jude, which was the source for 2 Peter.