Answer: Those who will suffer God's wrath and anger are those people who are self-seeking and who reject the Truth and follow evil, (verse 8).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
Self-seeking is what love is NOT:
1 Corinthians 13:4-7: "Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the Truth. It always protects, always trusts, always hopes, always perseveres."
Men who reject sound doctrine turn their ears away from the Truth:
2 Timothy 4:2-4: "Preach the Word; be prepared in season and out of season; correct, rebuke and encourage--with great patience and careful instruction. For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. They will turn their ears away from the Truth and turn aside to myths."
The Hebrew writer says that those who have learned the Truth and then reject it by continuing to live in sin have trampled the Son of God under foot. They are enemies of God:
Hebrews 10:26-31: "If we deliberately keep on sinning after we have received the knowledge of the Truth, no sacrifice for sins is left, but only a fearful expectation of judgment and of raging fire that will consume the enemies of God. Anyone who rejected the law of Moses died without mercy on the testimony of two or three witnesses. How much more severely do you think a man deserves to be punished who has trampled the Son of God under foot, who has treated as an unholy thing the blood of the covenant that sanctified him, and who has insulted the Spirit of grace? For we know Him who said, ‘It is Mine to avenge; I will repay,' and again, ‘The Lord will judge His people.' It is a dreadful thing to fall into the hands of the living God."
Peter describes people who turn away from Truth and return again to the corruption of the world as, among other things, dogs who return to eat their own vomit:
2 Peter 2:17-22: "These men are springs without water and mists driven by a storm. Blackest darkness is reserved for them. For they mouth empty, boastful words and, by appealing to the lustful desires of sinful human nature, they entice people who are just escaping from those who live in error. They promise them freedom, while they themselves are slaves of depravity--for a man is a slave to whatever has mastered him. If they have escaped the corruption of the world by knowing our Lord and Savior Jesus Christ and are again entangled in it and overcome, they are worse off at the end than they were at the beginning. It would have been better for them not to have known the Way of righteousness, than to have known it and then to turn their backs on the sacred command that was passed on to them. Of them the proverbs are true: ‘A dog returns to its vomit,' and, ‘A sow that is washed goes back to her wallowing in the mud.'"
Concerning following evil:
Jeremiah 11:7-8: [God said,] "From the time I brought your forefathers up from Egypt until today, I warned them again and again, saying, ‘Obey Me.' But they did not listen or pay attention; instead, they followed the stubbornness of their evil hearts. So I brought on them all the curses of the covenant I had commanded them to follow but that they did not keep."
Jude, verses 14-21: "Enoch, the seventh from Adam, prophesied about these men: ‘See, the Lord is coming with thousands upon thousands of His holy ones to judge everyone, and to convict all the ungodly of all the ungodly acts they have done in the ungodly way, and of all the harsh words ungodly sinners have spoken against Him.' These men are grumblers and faultfinders; they follow their own evil desires; they boast about themselves and flatter others for their own advantage. But, dear friends, remember what the apostles of our Lord Jesus Christ foretold. They said to you, ‘In the last times there will be scoffers who will follow their own ungodly desires.' These are the men who divide you, who follow mere natural instincts and do not have the Spirit. But you, dear friends, build yourselves up in your most holy faith and pray in the Holy Spirit. Keep yourselves in God's love as you wait for the mercy of our Lord Jesus Christ to bring you to eternal life."
