Of course salvation is through Jesus Christ. None of these quotes say otherwise… Do we believe in receiving salvation without Christ? Of course not!
Brigham Young:
There is not a man or woman, who violates the covenants made with their God, that will not be required to pay the debt.** The blood of Christ will never wipe that out, your own blood **
must atone for it; and the judgments of the Almighty will come, sooner or later, and every man and woman will have to atone for breaking their covenants.
It is true that the blood of the Son of God was shed for sins through the fall and those committed by men,** yet men can commit sins which it can never remit.** Journal of Discourses Volume 4 Page 54 (1856)
Suppose you found your brother in bed with your wife, and put a javelin through both of them, you would be justified, and they would atone for their sins and be received into the kingdom of God. I would at once do so in such a case; and under such circumstances, I have no wife whom I love so well that I would not put a javelin through her heart, and I would do it with clean hands. . . . If the Lord so ordered it that they are not caught in the act of their iniquity, it is pretty good proof that He is willing for them to live; and I say let them live and suffer in the flesh for their sins, for they will have it to do. There is not a man or woman who violates the covenants made with their God, that will not be required to pay the debt.
The blood of Christ will never wipe that out, your own blood must atone for it. Journal of Discourses Volume 3 Page 247 (1856)
There are sins that men commit for which they cannot receive forgiveness in this world, or in that which is to come, and if they had their eyes open to see their true condition, they would be perfectly willing to have their blood spilt [sic] upon the ground, that the smoke thereof might ascend to heaven as an offering for their sins; and the smoking incense would atone for their sins, whereas, if such is not the case, they will stick to them and remain upon them in the spirit world. I know, when you hear my brethren telling about cutting people off from the earth, that you consider it is a strong doctrine; but it is to save them, not destroy them. Journal of Discourses Volume 4 Page 53 (1856)
I do know that there are sins committed, of such a nature that if the people did under the doctrine of salvation, they would tremble because of their situation. And furthermore, I know that there are transgressors, who, if they knew themselves, and the only condition upon which they can obtain forgiveness, would beg of their brethren to shed their blood, that the smoke thereof might ascend to God as an offering to appease the wrath that is kindled against them and that the law might have its course.** I will say further; I have h****ad men come to me and offer their lives to atone for their sins.** Journal of Discourses Volume 4 Pages 53-54 (1856)
Now take a person in this congregation who has knowledge with regard to being saved in the kingdom . . . and suppose that he is overtaken in a gross fault, that he has committed a sin that he knows will deprive him of that exaltation which he desires,** and he cannot attain to it without the shedding of his blood, and also knows that by having his blood sh****ed he will atone for that s**in, and be saved and exalted with the Gods, is there a man or woman in this house but what would say, “shed my blood that I may be saved and exalted with the Gods?” All mankind love themselves, and let these principles be known by an individual, and he would be glad to have his blood shed. That would be loving themselves, even unto an eternal exaltation. Will you love your brothers or sisters likewise, when they have committed a sin that cannot be atoned for without the shedding of their blood? Will you love that man or woman well enough to shed their blood? Journal of Discourses Volume 4 Page 219 (1857)
I could refer you to plenty of instances where men have been righteously slain, in order to atone for their sins. I have seen scores and hundreds of people for whom there would have been a chance (in the last resurrection there will be) if their lives had been taken and their blood spilled on the ground as a smoking incense to the Almighty, but who are now angels of the devil, until our elder brother Jesus Christ raises them up—conquers death, hell, and the grave. I have known a great many men who have left this Church for whom there is no chance whatever for exaltation, but if their blood had been spilled, it would have been better for them. The wickedness and ignorance of the nations forbid this principle’s [sic] being in full force, but the time will come when the law of God will be in full force. This is loving your neighbour [sic] as ourselves; if he needs help, help him; and if he wants salvation and it is necessary to spill his blood on the earth in order that he may be saved, spill it. Any of you who understand the principles of eternity, if you have sinned a sin requiring the shedding of blood, except the sin unto death, would not be satisfied nor rest until your blood should be spilled, that you might gain that salvation you desire. This is the way to love mankind. Journal of Discourses Volume 4 Page 220 (1857)