The jury system was never intended to be correct 100% of the time. No system of justice is, or can be. The Founders recognized this, and so they structured the system with a presumption of innocence, and provided enough protections to criminal defendants that the process, in many ways, errs on the side of innocence (that is, the system is designed to create more incorrect not guilty verdicts than incorrect guilty verdicts).
He was never charged with intent to carjacking or with trying to rob Minucci.
"Intent to [commit] carjacking" is not a crime, and there was no evidence that the guys had taken any steps towards carjacking or auto theft that night. They went to Howard Beach with the intent of doing so, sure, but had not yet done anything criminal.
Nick was not given a jury of peers but a multi ethnic jury
That's an absurd statement. The fact that the jury was "multi ethnic" does not mean it wasn't a jury of his peers.
Now I see what blacks mean by ‘’Is it justice or ‘’just us?’’.