Infernalism is the worst form of arrogance -- and sinful
The best way anyone framed the concept of sin to me as the absence, or even rejection, of God and God's love. It is not merely enough to transgress; how can you violate a law that you are unaware of or are incapable of understanding fully? It doesn't seem to me that a God who loves us would then create rules that, if violated, end up in a "God hates you" kind of ending. That doesn't seem like love to me. That's just legalism, and it is not what Jesus taught.
Belief in infernalism is among the worst forms of sin. Not only are you refuting the belief in an all-loving and forgiving God, which has been stated to us in the scripture, but invariably anyone that truly professes infernalism always places themselves just outside of the category of someone who'd deserve Hell. "I'm a sinner!" they say, but if you ask them if they'll be going to hell? Of course not.
The response to that is generally "well I know I'm a sinner, but I ask for forgiveness." Great! So under your model, why can't a homosexual ask for forgiveness and everything will be good to go? "Well they know they're doing wrong and continue to do it." Apply that to anyone who "lives in sin".
Okay, so have you given your wealth and riches to the poor, seeing as how it's harder for a camel to enter the eye of needle than for a rich man to achieve the kingdom of God? Because by any standard, even poor Westerners are wealthier than any poor person that has ever lived before them. No, of course they don't ask for forgiveness for that and neither do they actually "give" of anything. Have you stopped thinking unclean thoughts? Have you stopped coveting your neighbor's treasures? Infernalists cast stones, publicly or privately, but never look in the mirror to see the extent of their own arrogance. The kingdom of heaven only happens to be just within reach -- for them. Not you. Not anyone that disagrees with them.
We all knowingly sin. We should all do better to not sin. But we should reconsider why God identifies "sin" as something bad or to be avoided: because sin, by it's nature, does not make us feel one with God, nor does it help us live out fulfilled lives.
God knows that murder fills us with guilt and remorse and shame, and it causes pain in the lives of so many. That is the opposite of love, and so God commands us not to murder. God knows that promiscuity only leads to emotional emptiness, and so God asks us to wait until marriage and find love so we can share our lives with another person -- it's because God loves us that He tells us that these sorts of things should be avoided. Love of money or status or material goods is just trying to fill a bottomless void in our hearts that only God can fill; the sin is in trying to use the world to replace God, not because God is some vindictive, egotistical spirit, but because God knows what's good for our hearts and what will fill us.