Murderers shouldnt be saved....
If murderers shouldn't be saved, then we need to stop reading about 2/3 of the New Testament, since most of the New Testament was written by a murderer who was stopped on a road, by Jesus himself.
By the way, the Bible does not state that killing is a sin, but murder is a sin. The translations that state that killing is a sin mistranslated it from the original Hebrew text.
And as for suicide being the unpardonable sin, since when did this become blaspheming the Holy Spirit. While I do believe it is wrong to kill yourself, I don't think that God will not forgive this. However, I do believe that a person who kills himself/herself is selfish and not in there right minds, as 2 other people have stated.
For someone to say that suicide is not selfish, they have more than likely not have had to suffer from the death of a friend or loved one, or else not seen what the families have to go through. People who are suicidal are thinking pretty much only of themselves. They may think they are doing it for others, but in reality, it's more self focused, as in I wouldn't have caused this, or you would be better off without me, etc...
As for stating they are not in there right mind, most people who kill themselves are generally depressed. Depression, the last time I checked, is a form of mental illness.
I don't know if anyone has mentioned any of these points, and I apologize if I repeat any.