King Claudius' Lesson to Today's Self-Loathing Americans

We hear a lot of self-loathing from American's today, who seem to take upon themselves all the reproach for sins committed by others before they were born.

Are they correct? If so, they should take a heed of King Claudius' dilemma :

"...But, O, what form of prayer

Can serve my turn? 'Forgive me my foul murder'?

That cannot be; since I am still possess'd

Of those effects for which I did the murder,

My crown, mine own ambition and my queen.

May one be pardon'd and retain the offence?" Hamlet, Act 3, Scene 3.

Even this rotten-in-Denmark king knew that keeping the benefits of a sin negated any repentance. 

If our self-loathing American friends are correct, all the benefits they have received from the sins they are self-loathing about must be returned. Otherwise all the apologies in the world mean nothing. 

My white ancestors were poor immigrants from Europe who worked hard to get where they are today. I am proud of my heritage and plan to keep what little I have gained from it. I hope that any zealous self-loather will be content to give back the benefits they feel they don't deserve and leave that of others alone.