The reason I always knew why most Jewish suicides are not buried accordingly, is because they probably regretted their decision (and did tshuva) in the moments before they died. And it seems the research backs it up. Below is a 2014 Business Insider article. I thought I’ll just copy paste part of it and post, but because it’s so informative and relevant here I’ll post the whole thing, broken up a bit for our dear mods.
“The Role Of Impulsiveness Is One Of The Saddest Things About Suicide
Robin Williams reportedly suffered from severe depression, addiction, and alcoholism before he killed himself at his California home Monday.
We may never know exactly when and how Williams arrived at the decision to commit suicide, but one of the saddest realities about suicide is that it often results from impulsive decisions that might have never occurred again if the person had survived or backed out.
Anywhere from one-third to 80% of all suicide attempts are impulsive acts, according to The New England Journal of Medicine. 24% of those who made near-lethal suicide attempts decided to kill themselves less than five minutes before the attempt, and 70% made the decision within an hour of the attempt.