[. . . abruptly, he is reminded of the weird conversation he had with Minami about humans. . .]

They're. . . monsters.

[he continues, very tentative, unsure how Sanji will react]

Creatures that ravage the land with their strength. They destroy villages and murder indiscriminately wherever they go. Most armies don't stand a chance against them.

[. . .]

I've watched as one killed an entire squadron of soldiers in one evening.