Justification is a concept I don’t recall being in my metaphysical pandora’s box or my highest theological concept. I still don’t care, but I needed a word for J -day.
In the Jesus brand of theology, justification is god’s removing the guilt and penalty of sin (call it hell). If you spin your English just right, you get to go to a good place instead of the bad one. But you must have faith and believe. To Christians, this makes sense.
Since the Protestant Reformation, and probably before, justification was and area of significant disagreement. It is also an area of significant theological fault that, to this day, divides Roman Catholicism from the Lutheran and Reformed traditions of Protestantism.
Catholics, Methodists, and Orthodox distinguish between initial justification, which occurs at baptism, (ala infant baptism) and final salvation, accomplished after a lifetime of doing what you’re supposed to.
In Lutheranism and Calvinism, righteousness in the eyes of God is viewed as being credited to the sinner’s account through faith alone, without works, which maybe fodder for W-day.
My point here is that all these branches of Christianity, supposedly one religion, have fought over this woo-woo hair-splitting nonsense for reasons none of us probably care much about.
Atheists, agnostics, Muslims, Hindu, and Buddhists need not worry. There is no justification for any of this.