Universalism is a lie, a false teaching that teaches a false secuirty.
Clearly not everyone will be saved:
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Tit 2:11 For the grace of God has appeared, bringing salvation to all men,
Tit 2:12 instructing us to deny ungodliness and worldly desires and to live sensibly, righteously and godly in the present age,
Tit 2:13 looking for the blessed hope and the appearing of the glory of our great God and Savior, Christ Jesus,
Tit 2:14 who gave Himself for us to redeem us from every lawless deed, and to purify for Himself a people for His own possession, zealous for good deeds.
Tit 2:15 These things speak and exhort and reprove with all authority. Let no one disregard you.
No where does it say that all men will accept the salvation that God provides.
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1Co 6:9 Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor homosexuals,
1Co 6:10 nor thieves, nor the covetous, nor drunkards, nor revilers, nor swindlers, will inherit the kingdom of God.
This is a list of the type of people who will not be saved.
Want more?
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Mat 5:20"For I say to you that unless your righteousness surpasses that of the scribes and Pharisees, you will not enter the kingdom of heaven.
Mat 7:21"Not everyone who says to Me, 'Lord, Lord,' will enter the kingdom of heaven, but he who does the will of My Father who is in heaven will enter.
Mat 7:22"Many will say to Me on that day, 'Lord, Lord, did we not prophesy in Your name, and in Your name cast out demons, and in Your name perform many miracles?'
Mat 7:23"And then I will declare to them, 'I never knew you; DEPART FROM ME, YOU WHO PRACTICE LAWLESSNESS.'
Mat 18:3 and said, "Truly I say to you, unless you are converted and become like children, you will not enter the kingdom of heaven.
Mar 10:15"Truly I say to you, whoever does not receive the kingdom of God like a child will not enter it atall."
Gal 5:19 Now the deeds of the flesh are evident, which are: immorality, impurity, sensuality,
Gal 5:20 idolatry, sorcery, enmities, strife, jealousy, outbursts of anger, disputes, dissensions, factions,
Gal 5:21 envying, drunkenness, carousing, and things like these, of which I forewarn you, just as I have forewarned you, that those who practice such things will not inherit the kingdom of God.
Clearly not everyone will be saved, although God does offer it to all.
People who preach this different gospel must repent or suffer the consequences.
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Jud 1:3 Beloved, while I was making every effort to write you about our common salvation, I felt the necessity to write to you appealing that you contend earnestly for the faith which was once for all handed down to the saints.
Jud 1:4 For certain persons have crept in unnoticed, those who were long beforehand marked out for this condemnation, ungodly persons who turn the grace of our God into licentiousness and deny our only Master and Lord, Jesus Christ.
Jud 1:5 Now I desire to remind you, though you know all things once for all, that the Lord, after saving a people out of the land of Egypt, subsequently destroyed those who did not believe.
Jud 1:6 And angels who did not keep their own domain, but abandoned their proper abode, He has kept in eternal bonds under darkness for the judgment of the great day,
Jud 1:7 just as Sodom and Gomorrah and the cities around them, since they in the same way as these indulged in gross immorality and went after strange flesh, are exhibited as an example in undergoing the punishment of eternal fire.
Jud 1:8 Yet in the same way these men, also by dreaming, defile the flesh, and reject authority, and revile angelic majesties.
Jud 1:9 But Michael the archangel, when he disputed with the devil and argued about the body of Moses, did not dare pronounce against him a railing judgment, but said, "The Lord rebuke you!"
Jud 1:10 But these men revile the things which they do not understand; and the things which they know by instinct, like unreasoning animals, by these things they are destroyed.
Jud 1:11 Woe to them! For they have gone the way of Cain, and for pay they have rushed headlong into the error of Balaam, and perished in the rebellion of Korah.
Jud 1:12 These are the men who are hidden reefs in your love feasts when they feast with you without fear, caring for themselves; clouds without water, carried along by winds; autumn trees without fruit, doubly dead, uprooted;
Jud 1:13 wild waves of the sea, casting up their own shame like foam; wandering stars, for whom the black darkness has been reserved forever.
2Pe 2:1 But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.
2Pe 2:2 Many will follow their sensuality, and because of them the way of the truth will be maligned;
2Pe 2:3 and in their greed they will exploit you with false words; their judgment from long ago is not idle, and their destruction is not asleep.