Okay. We can get mixed up on words a little once in a while. Christianity is the only religion where salvation itself is given by God as a simple and pure gift, if the person accepts it. All other religions that offer salvation have the individual working for it a bit at least.

I find that to be a flaw. A murder, rapist, or mass killer could be a Christian. After killing thousands of people, he/she should still be granted access to heaven where everything is great?
There is rumor, and strong evidence here and there, that Hitler made it to Argentina after WWII, and died there in his 90s.
If Hitler turned to Jesus in repentance for his crimes, and accepted that God would forgive him because of the sacrifice Jesus did on the cross, even Hitler would be saved.

Which is obviously a flaw. People like that should not be saved just because he believes in the sacrifice of Jesus. If you believe that Hitler should belong in heaven, then I don't know why I'm even having this conversation with you.
I don't have a clue about Hitler. I was using him as an "if" example.
Nobody can save himself. If somebody could, he would start by living for a few hundred years. Are we aware of anyone who is alive and at least 200-years-old? No! If there are any, they are not telling. Most of us die, it seems, before 100.
The point is, nobody can save himself. We need someone or something to do it for us, or we are lost.
