Reddit mentions of Divine Justice (English and Arabic Edition)

One of the principles of Shia Islam is the belief in 'adalat, that is, God's justice. This covers many things, including who ends up where in the afterlife. So for the latter, no one will go to Hell unless they are deserving of it, whatever their label might be. As such, trust in God's justice that whatever is right will be done, and try not to concern yourself with determining whether others are going to Hell or not, since it isn't our decision anyway.

There's a book on the topic of God's justice written by a prominent Shi'a scholar of the last century that you might find of interest:

http://www.kazi.org/Books/Jurisprudence/Divine-Justice
https://www.amazon.com/Divine-Justice-English-Murtada-Mutahhari/dp/0934905533

By the same author (and it might be an extract of the above book, I'm not sure), on this specific topic about non-Muslims:

https://www.al-islam.org/islam-and-religious-pluralism-ayatullah-murtadha-mutahhari