>>17802394 (OP)>Genocide of NativesThis happened unintentionally.
>SlaveryIf not the worst, this is among the worst things to ever happen in America. It should be noted that those who call themselves Jews owned many of the slave ships and were the primary beneficiary of the Atlantic slave trade.
My answer is neither of the above, but rather what I am about to describe below:
The current worst crime being committed right now is the blood sacrifice of unborn children being massacred every day, like animals, by the abortion industry and those who go along with it. It is a human sacrificing ring, like those who in ancient times would offer their children as burnt offerings to idols such as Moloch.
There is even a storage facility of human remains (of murdered children) at the University of Pittsburgh. From this facility, which is run by people associated to planned parenthood, they illicitly sell, for profit, the body parts of children who died by abortion. The mainstream media has worked to cover up this fact by straight up lying about the facts, because the sale and auctioning of these organs and body parts is supposed to be illegal.
This abortion industry, which for America started in the late 1960s, is equally as immoral as slavery if not worse.