It's interestingly how you silently show that 'group' classification of humans allows any person to do any action they want to another person as long as they can find a means of putting them in a particular group.
I explicitly pointed it out because it's been a part of human history since humans had a history. Declaring something exists is not the same as justifying that they've done it. We have Memorial Day to honor people who died to go overseas and kill people, and Veterans Day to honor the people who didn't die to go overseas and kill people. Would I consider that to be a gap in morality? Sure, but it exists AND it's not specific to the United States either.
I explicitly pointed it out because it's been a part of human history since humans had a history. Declaring something exists is not the same as justifying that they've done it. We have Memorial Day to honor people who died to go overseas and kill people, and Veterans Day to honor the people who didn't die to go overseas and kill people. Would I consider that to be a gap in morality? Sure, but it exists AND it's not specific to the United States either.