"Did Jesus die for Hitler?"
This is an interesting question, but is also a somewhat inflammatory one. It carries emotional baggage because of the horrors Hitler directed during WWII. A better question is whether or not Jesus died for those who never accept Him as Lord and Savior. I think we (meaning biblical Christians) can all agree that Jesus certainly died for all those who have faith in Him. But what about those who never believe?
We can also agree that all those who do not believe in Jesus as Lord and Savior go to hell when they die. Jesus was abundantly clear about this.
Back to the question at hand: Did Jesus die for unbelievers?
The answer to this question is closely tied to whether Jesus' sacrifice on the cross produces actual salvation or potential salvation. If Jesus' death actually produces salvation, then He must have died only for those who would believe. Otherwise, everyone would be saved. Actual salvation only occurs for Christians.
If, however, Jesus' sacrifice does not actually save, but only potentially saves, then He could have died for Hitler or anyone else. He could have died for everyone who ever lived. If Jesus' death potentially brought salvation, then something else has to be added to Christ's work on the cross in order to earn salvation. In this view, what is added must be faith.
The problem with the "potential view" is that faith becomes a work, whereby man earns salvation through Christ's death AND his own faith.
The bible makes it clear that we are saved by grace alone.
Ephesians 2:8-9, "For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast."
Additionally, the bible tells us that Jesus' death actually procured salvation. He actually bore sin and paid for sin.
Isaiah 53:11-12, "He shall see the labor of His soul, and be satisfied. By His knowledge My righteous Servant shall justify many, for He shall bear their iniquities. Therefore I will divide Him a portion with the great, and He shall divide the spoil with the strong, because He poured out His soul unto death, and He was numbered with the transgressors, and He bore the sin of many, and made intercession for the transgressors."
II Corinthians 5:21, "For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him."
I Peter 2:24, "who Himself bore our sins in His own body on the tree, that we, having died to sins, might live for righteousness -- by whose stripes you were healed."
The bible tells us repeatedly that Jesus' sacrifice was enough to buy salvation. Nothing else adds to His work. This is one of the things that differentiates Christianity from all other religions. All other religions offer a works-based salvation. Christianity is grace-based. God has done all the work needed for salvation, and then bestows it as a gift.
If Jesus died for every individual, then His death only bought a potential salvation. This view suggests that Jesus' death on the cross was not enough. Faith becomes a work.
If, however, Jesus' sacrifice did actually purchase salvation, then no other work is required. His death was enough. This view holds that Jesus died for the elect, not for all individuals.
So, did Jesus die for everyone? Did Jesus die for Hitler?
The answer has to be a resounding "No." Otherwise, salvation is not of grace.
(So where does faith come in? Faith is a response to the regenerating work of the Holy Spirit. Faith does not earn salvation, but everyone who is saved does have faith in Christ.)
What should we do in response to this awesome truth? Fall on our faces in praise and thanks to the God who died for us.