You are, when you insist that "our sins" is referring to unbelievers.
Paul makes stipulation to unbelievers....that's awkward for you when you preach sins are forgiven unbelievers.
Get a decent translation and learn how to quote it. It's no wonder you remain stuck on something so simple....you quote scripture the way God's UNtruth does.
1 Cor. 15:1-3 Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
Gee, I wonder what that might be? :think:
Romans 3:21 But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets; 22 Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
Romans 3:23 For all have sinned, and come short of the glory of God;
Romans 3:24 Being justified freely by his grace through the redemption that is in Christ Jesus: 25 Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
Romans 3:26 To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.
Why would you claim "our sins" covers unbelievers?