Thus He will sprinkle many nations - Isaiah 52:15a
The term "sprinkle" is used in relationship to a blood sacrifice.
Bs"d
It is also used in many other relations. There is no iron clad rule that it must refer to a blood sacrifice.
Without the shedding of blood, there will be no forgiveness of SIN.
Of course there is forgiveness without the shedding of blood.
Lev 5: "Anyone who cannot afford a lamb is to bring two doves or two young pigeons to the Lord as a penalty for their sin—one for a sin offering and the other for a burnt offering. 8 They are to bring them to the priest, who shall first offer the one for the sin offering. He is to wring its head from its neck, not dividing it completely, 9 and is to splash some of the blood of the sin offering against the side of the altar; the rest of the blood must be drained out at the base of the altar. It is a sin offering. 10 The priest shall then offer the other as a burnt offering in the prescribed way and make atonement for them for the sin they have committed, and they will be forgiven.
11 If, however, they cannot afford two doves or two young pigeons, they are to bring as an offering for their sin a tenth of an ephah of the finest flour for a sin offering. They must not put olive oil or incense on it, because it is a sin offering. 12 They are to bring it to the priest, who shall take a handful of it as a memorial[c] portion and burn it on the altar on top of the food offerings presented to the Lord. It is a sin offering. 13 In this way the priest will make atonement for them for any of these sins they have committed, and they will be forgiven."
As we see here, forgiveness can be gotten through a flour offering. No blood being shed.
Read here more about forgiveness without blood:
https://sites.google.com/site/777mountzion/sacrifices
The term "nations" refers to Gentiles (goyum)
Perhaps you should learn what your own scripture says.
Obviously YHWH provides for forgiveness of sin for Gentiles.
Of course He does. If they repent, and return to Gods laws, then God forgives.
But that still doesn't mean that Isaiah 53 speaks about the messiah.
It doesn't.
For the finer details look here:
http://Isaiah53.notlong.com