You are quite mistaken in your assertion that murder and suicide are unforgiveable. If God is the final arbitor of what is or is not forgiveable, Jesus Christ plainly states that blaspheming the Holy Spirit is the only unpardonable sin. “And so I tell you, every sin and blasphemy will be forgiven men, but the blasphemy against the Spirit will not be forgiven. Anyone who speaks a word against the Son of Man will be forgiven, but anyone who speaks against the Holy Spirit will not be forgiven, either in his age or in the age to come.”(Matthew 12: 31-32) Christ himself said it. Blaspheming the Holy Spirit happens when the miracles of God are attributed to Satan. Only ignorant and foolish people said that Jesus was casting our demons by Beelzebub (the prince of demons - a.k.a. Satan). His answer to them ought to sober anyone up who pretends to know what can and cannot be forgiven.
Remember also that the Lord’s prayer also says “forgive us our trespasses as we forgive those who trespass against us.” The teaching Jesus relates to this prayer is very illustrative. “For if ye forgive men their trespasses, your heavenly Father will also forgive you: But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.”
(Matthew 6:14-15)
I'm not making this stuff up. So you can quit trying to scold me as if I alone am attempting to set a rule you don't like. And pointing out that I'm not qualified to determine anyone's judgment in the here after is hardly proof that I'm wrong about this or that you are right.