Well for one let me make a very generic theist comment and say... who am I to argue with what God sees as legitimate? Lol now that I got that out of the way let me elaborate more on this subject.
Not that this is really relevant to your response but I just want to clear this up a bit. The idea that Jesus was crucified for all of our sins (actions) is somewhat of a blurred concept, because the idea seems to suggest that we are removed from the consequences of our actions which is not a legit spiritual concept to begin with, it is basically a misconception.
What Jesus actually taught (His own words) was that He had the power to "forgive sins", what's the difference? well Jesus did not die to make it appear that human sins don't exist that is not an accurate depiction. Rather what Jesus is teaching is that for those who desire sincerely to abide in a state of moral and spiritual purification, He has the authority to absorb what we don't have the ability to fix. This is the principle of grace of course, but we have to participate in that, it's not an automatic procedure for everyone who sins.
To be forgiven, one must repent and to abide in that forgiveness one must be committed to not commit the same mistakes. So while your past "can" be forgiven one must abide in that state of purification by upholding that state of grace, and we do that through living in a righteous way the best way we know how. When we screw up, the process must be the same....we repent, and considering it's a sincere gesture we move forward and stop doing what we did. When a person repents and has remorse for what they did and looks to the cross of Calvary, instead of God seeing the sins they committed God sees the punishment Jesus absorbed and forgiveness is granted.
Why do we have to consider doing this? well you don't of course, but this goes back to what I was saying about sins don't just dissipate into the air. Actions are eternal because God is eternal and God always sees and feels them...those actions must be absorbed either by you or some other means of absorption. You don't want the full weight of what you've done to be accounted to you when it's all said and done, even though it's a commendable thought, you basically don't really know what you're asking for. It is always better to lean on God for things outside of our scope of understanding because we don't really know the ramifications for things we don't always see. So when you lean on Jesus you're not really ignoring all the things you may have done, rather you're focus is on your mistakes and you know you don't have the power to fix it, so you decide to abide in God's grace that has been prepared for you. Once that is done, you commit to your future by upholding that state of grace through your actions and your attitude towards God.
It's kind of a simple concept and it should be, we just have to get outside our pride so to speak and realize we can't fix everything and we can never go back in time and change what we've done so again, we rely on God as a means of countering things we can't fix.
Sorry about rambling there, but to get to your response I would say okay....but why waste what has been already prepared even though you may not agree with it or may not even fully understand it? if you saw a 100$ bill floating down the street would you go snatch it up or would you let it float into the woods to never be seen again? you may feel bad that somebody lost it, you may not "want" to use somebody else's hard earned cash but you know you can't return it so what do you do? do you take advantage of that situation or waste it?
Jesus knew he was doing something He was not guilty of, that besides the point. Jesus voluntarily chose to absorb that which He thought you would never be able to, you may not like it but why waste the effort? because you can't change it why let it drift away when you could take what is rightfully yours to use?
Don't misunderstand me here, I'm not a proponent of this whole idea about Jesus dying for all sins and we have no accountability for them, or we just say a few words and we are forgiven. Sincere repentance goes much deeper than that! there's a powerful exchange between our repentance and God's forgiveness but I'll leave it that for now. But I do understand grace and so I'm trying to break it down for you in a way you can rationally accept it. I'm sure you won't lol, maybe it will come back to you one day when you really get curious about God and want to get closer to that Reality. Once you do, you may become ashamed because you look back on your life and realize you could have the whole time. Then it may occur to you that you have no way to change that, or fix things you may feel guilty about...except then you remember what ol Jesus did and that He may have provided something useful for you to utilize even though you may not feel fully okay with it. But the urge to feel clean before God outweighs your rejection of that offer and you might even apply it. Either way, something has to absorb sin, so hopefully you won't just fluff it off and never consider it.
You may not find Jesus' offer acceptable and may never apply it. But you can commune with God about forgiveness anyways, and maybe you don't really know why you would ever feel that way because you never really believed in God anyways. But as I said, when the Reality hits you...it's like something that just spontaneously happens, it just comes up and so it's natural to feel ashamed about the self. Once you start to desire to be within the presence of God in a way you never thought about it will force your spirit to look at your imperfections. This isn't to make you feel condemned it's not about that. But you realize more the full weight of what it means to live this life and so you look back at all your wasted motives and intents that they could have been so much more. God then begins to provide grace in that moment, but you to have participate in that and abide in it. What Jesus did simply provides for you an outlet to solve this phenomenon. Had you never heard of Jesus the same thing would still happen, but it makes it easier when someone creates a tool specifically for a job that needs to be done, it simply makes the job easier and more efficient.
