At what point is one justified to pass judgment on another for their religion, worldview, or actions?
Never. As a Hindu I don’t believe even God does that.
What is the basis or foundation of such judgment?
Hubris. People think they are “guiding” the person away from evil, and doing God’s bidding. Nothing could be further from the truth.
At what point is one justified in "standing up" to another? Is it justified even when the actions of another have no impact on the person passing judgment?
There is never a justification for calling out someone’s flaws. It’s not “standing up” or guiding.
“Has no one condemned you?”
“No, Lord.”
“Then neither do I condemn you. Go and sin no more.”
The difference is he had the authority to condemn, or judge, or forgive. And he didn’t condemn or judge. So where people get off thinking they can do what he didn’t do, is beyond me.
In your opinion, what are the implications, positive or negative, of judgment?
I don’t think there’s any positive outcome of judgment, only negatives.