Um, yeah, but no. The archaeological record shows that every time in the past when two or more species of humans co-existed, one of them exterminated the other. The neanderthal were to some minor extent assimilated by our own ancestors, DNA shows that, but mostly they were killed.
The first tool ever created by our distant Australopithecine ancestors was a club, made from the leg bone of an antelope. And then they promptly used it to kill each other.
The campaigns of Tamerlane resulted in the death, by direct and indirect causes, of an estimated 9% of the total population of planet earth at that time, (late 14th century CE).
We are killers. Our ancestors survived the Ice Age by learning to hunt together in bigger groups so they could kill really big animals. We of the species Homo Sapiens are the most efficient killers that have ever been, the most ruthless, the most savage, the most relentless. Tyrannosaurus Rex was an amateur compared to us.
The Bible says that God created us in his image. Similarly, if we create an AI in our image, it will be a killer par excellence, guaranteed.
RE: Are we able to build AI that will not ultimately lead to humanity's downfall?