Sure — those knives, arrows, swords, and clubs had entirely benign uses in that era of universal peace.
LOL! To say the least, the complete (or nearly complete) replacement was unlikely to have been 100% kumbaya. The complete disappearance of those earlier male lines suggests a small initial population, and/or a smaller male population (due to polygamy) in the earlier population. It also speaks to the general kookiness of the now abandoned conclusion that so-called mitochondrial Eve was 50K to 100K years older than Y-Adam.
Sidebars from the FRchives: