I believe you are mistaken. It is true at this point, God’s mercy is emphasized as we are ignorant of the extent of our evil and God wants all to come to repentance. That is not a cause for us to behave presumptuously as if God would never execute justice: Romans 2 explains
1 Wherefore thou art inexcusable, O man, whosoever thou art that judgest. For wherein thou judgest another, thou condemnest thyself. For thou dost the same things which thou judgest.
2 For we know that the judgment of God is, according to truth, against them that do such things.
3 And thinkest thou this, O man, that judgest them who do such things, and dost the same, that thou shalt escape the judgment of God?
4 Or despisest thou the riches of his goodness, and patience, and longsuffering? Knowest thou not, that the benignity of God leadeth thee to penance?
5 But according to thy hardness and impenitent heart, thou treasurest up to thyself wrath, against the day of wrath, and revelation of the just judgment of God.
6 Who will render to every man according to his works.
7 To them indeed, who according to patience in good work, seek glory and honour and incorruption, eternal life:
8 But to them that are contentious, and who obey not the truth, but give credit to iniquity, wrath and indignation.
9 Tribulation and anguish upon every soul of man that worketh evil, of the Jew first, and also of the Greek.
10 But glory, and honour, and peace to every one that worketh good, to the Jew first, and also to the Greek
We invite others to the mercy of God. Repent and cease to do evil, and God will forgive. His mercy endures forever, but what of those that neglect His mercy? Scripture says they receive wrath and indignation
Isaiah 5 tells us
16 And the Lord of hosts shall be exalted in judgment, and the holy God shall be sanctified in justice.
17 And the lambs shall feed according to their order, and strangers shall eat the deserts turned into fruitfulness.
18 Woe to you that draw iniquity with cords of vanity, and sin as the rope of a cart.
19 That say: Let him make haste, and let his work come quickly, that we may see it: and let the counsel of the Holy One of Israel come, that we may know it.
20 Woe to you that call evil good, and good evil: that put darkness for light, and light for darkness: that put bitter for sweet, and sweet for bitter.
21 Woe to you that are wise in your own eyes, and prudent in your own conceits.
22 Woe to you that are mighty to drink wine, and stout men at drunkenness.
23 That justify the wicked for gifts, and take away the justice of the just from him.
24 Therefore as the tongue of the fire devoureth the stubble, and the heat of the flame consumeth it: so shall their root be as ashes, and their bud shall go up as dust: for they have cast away the law of the Lord of hosts, and have blasphemed the word of the Holy One of Israel.
25 Therefore is the wrath of the Lord kindled against his people, and he hath stretched out his hand upon them, and struck them: and the mountains were troubled, and their carcasses became as dung in the midst of the streets. For all this his anger is not turned away, but his hand is stretched out still
Now is the time where Jesus offers mercy, as should we that are called by His name. The scroll which He read at the start of His ministry says it well
Isaiah 61
1 The spirit of the Lord is upon me, because the Lord hath anointed me: he hath sent me to preach to the meek, to heal the contrite of heart, and to preach a release to the captives, and deliverance to them that are shut up.
2 To proclaim the acceptable year of the Lord
That is now. The time for mercy is here, but it will not always be so, as the verse continues when it says
….. and the day of vengeance of our God: to comfort all that mourn:
3 To appoint to the mourners of Sion, and to give them a crown for ashes, the oil of joy for mourning, a garment of praise for the spirit of grief: and they shall be called in it the mighty ones of justice, the planting of the Lord to glorify him.
