What about the crusades & when Martin Luther wrote a book about the Jews?

How about the mutilation, killing and torturing of the natives of an entire huge continent by the devout Christians here in the USA. But they didn't stop with the brutal slaughter of many nations, who had been here for 20,000 years, they created the most successful slave trade, which cost by some estimates upwards of 80 Million kids and women being brutally killed in Africa, to get the few strong men needed, to work the Virgina plantations.