The Nephilim ate creatures while they were still alive, including humans. It is why God told Joshua to slaughter every living thing in some villages, because they were so tainted by perversion that nothing was still clean. Some of the Giants described in Indian lore could run alongside a buffalo and grab one up and rip off a leg and begin dining on it before the animal could do the service of dying. The Aztecs cut the hearts out of living sacrifices and held up the still beating heart, to serve their gods. Catholics have just refined the cannibalism to suit ‘modern sensibilities’.
I wonder if the Nephilim were the first cannibals that came along? They were infernal creatures for sure. My opinion is, they were the reason for the Flood.