And mass human sacrifice otherwise the corn won't grow.

I suggest that cultures which fuck kids, and indulge horrific torture for entertainment, cannibalism, a mix of all these and every other thing you can't even dream up... these aren't just different cultures. They are worse cultures. They are worse than the European culture which brought smallpox to wipe them the fuck out.
They were monsters. Real actual savages and the world is a better place without them in it. South, Central, and North America ought to celebrate Thank God For Europe Day. Otherwise they'd still be stacking rocks and finding nifty ways to pull each other's insides out.