one literally cannot know if said "mentally ill" suicidal person was capable of reason since that can only be established if the person is alive to be analyzed.
There are really few cases when we actually know someone gets into heaven or not anyway. (sainthood)
@ Petray- They hit us with three foot long metal rulers when we were smartasses. And I didn't intend on getting into a huge argument on the matter back when I made the post you were talking about. (about the mental stuff)
The only way to find out what happens after death is to die so not like any of your points really matter at all.
If everyone had that attitude, we'd still be hunter-gatherers.
Only after intellectual development came societal, technological and practical development.