Hitler died by his own hand. That is suicide without repentance. He is surely in Hell.
So did Samson, and yet he is mentioned in the "hall of faith" (Heb 11).
For that matter, Jesus said that He Himself died at His own hand:No one takes it [his life] from me, but I lay it down of my own accord. I have authority to lay it down and authority to take it up again. This command I received from my Father.
(John 10:18)
Now, if suicide is always a sin, why would God have given Samson the strength to commit suicide?
How could the Father command Jesus to sin? — The whole point of Jesus's sacrifice is that He was sinless, and that by being sinless He could be the perfect sacrifice.
That is suicide without repentance.
Jesus certainly didn't repent either, He bore all our sin and guilt in His own body and died with it; that is, if He repented of it, our sins could not have been paid.
All suicides are in Hell?