Guilt is what someone feels when they believe, whether justified or not, that they have violated a moral standard.
I think it is also a judgment that is externally applied to someone who has violated a moral standard, even if they are unaware that they have, or deny that they have, based on their possibly erroneous beliefs.
In either case, there will normally be the requirement either for the immoral action to stop, or for there to be redress, some balancing of the immorality with a good action of sufficient size.
That’s where bloodwashing comes in. Bloodwashing is the process by which parties who are guilty of an immoral act involving harm to other people try to do something to either minimise their actions, or to balance them with acts of good.