Why is it a weird thing? Imagine a world where Europe/Asia/Africa don't exist, and Aztecs/Incas are left to their devices. If anything, the conquest saved rivers of blood from being spilled over the coming many many centuries.

And sure, conquest was brutal and Columbus in reality did horrible things to natives - but the atrocities he and other conquistadors committed pale when compared to what the natives did themselves, and at least the conquest had put the continent on a path that ended the atrocities.