It really does NOT nullify free-will .. the future is FIXED by our actions.
It's only Abrahamists that argue that a god can know the future perfectly yet mans will is not determined. It's an incoherent position - internally self-contradictory, but one he is forced to hold if he's to have an omniscient, just god that punishes for choices made (moral responsibility). They just keep insisting that these two are compatible.
No illusion .. responsibility is not an illusion.
The illusion referred to is that one could have chosen otherwise. Responsibility in the legal sense is a human construct, which is different from saying that the sun is responsible for the light and warmth that bathe Earth or that the conscience is responsible for our sense of what is good and proper and what is not. That's determinism (causality).
Moral responsibility has to do with blame and punishment, and it's based in an assumption that people could have behaved otherwise, and because they didn't, it's right to make them suffer even if the suffering serves no constructive purpose as with burning in hell for eternity for failure to conform to certain standards of behavior or failure to believe in and worship a specific deity.
so the law is wrong, in holding people responsible for their actions?
It is proper to write and enforce laws for the well-being of the majority just as it is proper for a parent to have rules and enforce them with punishment at times, but it is not appropriate to hold anybody morally responsible in the sense just described - deserving of punishment for punishment's sake just as we wouldn't hold a lion morally responsible for forcing sex on a lioness or killing a zebra. Man has evolved a conscience, but not everybody has one and not everyone feels compelled to obey it in the face of conflicting desires.
The purpose of the penal punishment is to remove a danger from the streets, to serve as a disincentive to not imitate or repeat that behavior, in some cases restitution (assessing damages), and hopefully, someday, to rehabilitate. All of that is constructive, and all consistent with humanist values. Throw in punishment for punishment's sake as in prison should be as unpleasant as possible because bad people deserve to suffer, and your back to Abrahamic values.
And this is the Abrahamist's dilemma. His god punishes gratuitously - there's no constructive value in keeping a soul conscious just to make it suffer, which is what the term moral responsibility implies - for acts that it foresaw before it created man. And so the Abrahamist simply keeps insisting that omniscience and moral responsibility leading to punishment for punishment's sake are compatible, and nobody else makes that argument.
Having said all of that, I can agree that wanting people to suffer for their actions is very human. The survivors of a killer want that killer to receive the longest sentence possible in the least pleasant place possible. Trump's detractors want more than just to have a criminal removed from the streets and his victims compensated from his savings. Many relish in his suffering. They want him to live a long life in prison hating every day, raging, feeling vengeful while powerless to get revenge, feeling cheated, and feeling humiliated.
But this is gratuitous suffering. It does nothing for Trump or anybody else.
Is Trump morally responsible for being a narcissistic sociopath. Did he choose the genes and parents that led to that outcome? Does he have the ability to be a different and better person? It doesn't seem like it. Does he have free will or is he a robot to a series of pathological urges?
The Grateful dead wrote a song called Victim Or The Crime about just this topic:
Patience runs out on the junkie
The dark side hires another soul
Did he steal his fate or earn it?
Was he force fed, did he learn it?
Whatever happened to his precious self-control?
Like him, I'm tired of trying to heal
This tomcat heart with which I'm blessed
Is destruction loving's twin?
May I chose to lose or win?
Maybe when my turn comes I will have guessed.
And so I wrestle with the angel
To see who'll reap the seeds I sow
Am I the driver or the driven?
Will I be damned to be forgiven?
Is there anybody here but me who needs to know?
What it is that feeds this fever
As the full moon pales and climbs
Am I living truth or rank deceiver?
Am I the victim or the crime?