Not when the "debt" never existed in the first place and was made up generations later, as is the case of this so-called "reparation".
The demand for reparations is clearly an attempt to obtain monetary or personal gain by fraud.
This is the other thing about it, and I know in advance that you're not going to like it, so I'll note that I'm mostly explaining for the sake of others who may be reading. It's true that under US law from the colonial era through the Civil War, slavery was legal. And it's also true that the US Constitution forbids any
ex post facto law, i.e. a law that criminalizes something after the fact. Another way to say that is that you can't be held liable for an act that was legal when it was done.
And you're right as far as the Constitution goes.
But there's another concept of law that matters, that of the crime against humanity. Crimes against humanity are crimes so fundamental that it is impossible for a nation to legalize them. Such international norms are the only means we have of prosecuting things like the Holocaust, as the states involved had attempted to legalize these killings, and they are also the means by which we might hold repressive regimes like those of Iran, Cuba, and North Korea ultimately responsible for their crimes.
Slavery is widely recognized as a crime against humanity, which is to say that it never was properly legal. The United States, as an entity, is liable for it because it attempted to legalize slavery, and used government resources to enforce slavery. The fact that the laws of the nation permitted slavery is moot because it is illegal to enforce such laws.
Because the Civil War was fought by mostly white people, any demands that white people pay reparations beyond the cost of the Civil War turns the cost of the Civil War into a debt that must be paid back by the black people you want to give those reparations to.
Would you send the bill for World War II to the Jews, too?
You are advocating the payment of an unjust "reparation" on top of all that has already been paid in blood and money fighting the Civil War.
You obviously don't care for morals, liberty, or justice.
So, why do you really want this "reparation"?
The injustice was slavery. Stopping it was the responsibility of the People who had allowed it, not the people who fell victim to it.