All transgressions, (acts done without knowledge or full understanding), are covered through the Atonement and the Law of Azazel and do not even require a knowledge of Jesus Christ or the atoning sacrifice to have full efficacy.

However, those who actually commit sin must accept and apply His At-One-Ment into their lives by refusing to allow the innocent to suffer for their sins. This then flows forward from them to all people and generations to come and their acts which are truly sins are absolved through their having come to the necessary love and charity for the atonement to be in full force in their lives. And thus, they are truly... Saved. As they save all, so too shall all save them also. And thus the Love of Christ will fill the lives of all.

33 But God did call on men, in the name of his Son, (this being the plan of redemption which was laid) saying: If ye will repent, and harden not your hearts, then will I have mercy upon you, through mine Only Begotten Son;
34 Therefore, whosoever repenteth, and hardeneth not his heart, he shall have claim on mercy through mine Only Begotten Son, unto a remission of his sins; and these shall enter into my rest.