Those false teachers that tell us that Jesus Christ die for all the sinners amongst mankind, and yet they say multitudes for whom He did die, go to hell in unbelief and in their sins
Jn 8:24
24 I said therefore unto you, that ye shall die in your sins:
for if ye believe not that I am he, ye shall die in your sins[plural].
They do pervert God's Justice and here's how; For its liken unto this: Say a man was found guilty of a multitude of crimes against the State, in this he is justly sentenced to serve 25yrs as his punishment for those crimes. Upon release 25 yrs later, the following few days, he is again arrested and tried and found guilty of those same crimes, and sentenced to 25 yrs again as his just due punishment. That would be unjust would it not ? Was not Justice already served for those Crimes ? Of course it has, this is just a miscarriage of Justice, by convicting a criminal twice for the same crimes, and punishing him for the same, after justice has already been satisfied for those crimes.
Yet this is the conclusion we must come to, once we teach that those for whom Christ died, died for all their sins, satisfying all of God's Law and Justice for their crimes against His Holy Law, and now yet again they are made liable for those same crimes or sins, and this makes God a perverter of Justice.