The Merriam-Webster Dictionary definition of hubris is "exaggerated self-confidence."
This is the sample sentence they give to help you understand hubris:
"When conceived it was a project of almost unimaginable boldness and foolhardiness, requiring great bravura, risking great hubris."
Hubris (sorry, Merriam-Webster) is generally thought of as an exaggerated self-confidence that leads to total downfall.
This monument was carved on a mountain that is sacred to Native Americans. Not only is it hideous and disrespectful to the land in general, but also it is a colossal example of hubris.
Separation of church and state includes having respect for all churches. Even if they're mountainsides.
The higher they climb, the harder they fall. South Dakota? Tear.that.thing.down.