The Only Unforgivable Sin in the Bible

Roman catholics believe that there they separate sins into mortal invs, or two classifications of sin. If you commit a mortal sin, which would include killing, the only way to have that sin forgiven is to go through the sacrament of reconciliation. So i think because a roman ca, catholicism was such a popular belief under the banner of christianity for so long that people then believe that suicide is the givable ses. I honestly just don't really know why this is in the bible. Like, 80 % of the bible is his history book. And so it's doctmenting what happened sor jesus when he was on this earth. He said