Giving blanket forgiveness is no justice, for sure. What would we think of a judge who released repeat sex-offenders, molesters and murders because he "loves" them? certainly no "just!"
But the Christian God doesn't forgive unconditionally. First he demands that one believes he is a real God. Second we must believe that God took on flesh and suffered and died for our sins. Third, he demands that we be baptized in his name. Fourth, he demands confession and repentance in order to repeatedly look the other way in order to keep us "justified" in his eyes.
That's not unconditional mercy! It is conditional and biased injustice.
But you can't repeatedly commit the same sin, confess and "repent" of it, only to commit it again, and expect mercy ad infinitum.
Nope, no unconditional in the Bible. God sets a number of prerequisites for salvation.