Hi Ed: Thanks for your good concise points.
1. who says justice has to happen in this lifetime? The same way injustice is carried from generation to generation, of course, to break the cycle and bring Justice may not happen until the end of the entire process. If you look at the whole story of humanity, from beginning to end, there can be justice. But no, not if you take chapters out of context.
Any movie you watch doesn't have a happy ending if you only take the crises out of context. Overall it builds to a successful conclusion that outweighs the struggle to get there.
2. As for Buddhist and Christian teachings, what is the difference between teaching laws of karma and reaping what you sow? The Bible also says if you forgive, then you are forgiven. Or whatever words of judgment you impose on others, you too shall be judged.
Either way, there is justice; if we live by the Old Testament and hang each other by the letter of the law which kills relationships and humanity, ending in death and destruction as the OT shows.
Or we live by the New Testament where Jesus represents "restorative justice" that renews relations, not destroy them with judgment or punishing as in retributive justice.
Either way, we get the justice we give; not to "punish" us, but to learn by comparison; and to choose which way we prefer: to live and die by the sword, or to invest in healthy working relations, so collectively we progress toward spiritual peace and maturity.
3. I think what you may be referring to, what happens when "innocent" people die, such as in war, or criminal violence, drunk drivers, etc.
There is also "collective karma"
If we as humanity fail to do enough to end the cause of crime or war, then collectively innocent people die. And this forces us by conscience to do more to find and cure the causes.
If only people died who DESERVED to die anyway, then humanity would be content to let justice kill off those people by accident, by war or crime. But because innocent people die, then we are reminded we must seek the real reasons and try to correct and prevent them.
it is not the fault of the innocent people, but it is the responsibility of society as a whole to address.