The Old Testament isn't really conflated. It's not like those same atrocities haven't occured throughout the New Testament times and down through history. The Old Testament is simply more historical, whike the New Testament is mostly a bunch of letters written by a few people about establishing a church and laying out the new Christian religion and over a much shorter time frame.

You have to look at historical references outside of the New Testament to see the continuing trend of genocide, conquest, rape, forced conversions, and executions. But they exist. It's not like there was a huge gap of time that peaceful and harmonious between the rise of Christianity and the 20th century.

Good grief. Read Indigenous history of the Americas. Read about the Aborigines of Australia. Read about the colonization of Africa. Read about what happened to the slaves sent to Islamic countries once they were no longer economically viable. Read about the Ottomans.

It doesn't matter which one you're talking about. At some point in time, as each of these religions formed into empires, it's the same old story.

Annhilation of everyone else.