Can America ever truly pay for its sins?

[Belacqua]

Any sin can be payed for; but the sinner must:

1-Confess their sin to God and pray to never ever return to the sin
2-Try their best not to ever come back to that sin
3-Pay whatever penalty is there for the damage they did both to themselves and to others

There may be a step even before these three, which is in some cases most difficult of all.

And that is to understand that you've committed a sin at all. 

Way too many Americans still believe that the US is sinless, that the evils it has done have been somehow justified. Given the extreme effectiveness of US media propaganda, I don't think it's likely we'll ever get officially up to step one, and be able to confess.