The mention of a shooting without any details lead me to read up on this complex and, wow, what a disaster.
https://www.frcheraldstar.com/news/trouble-prepper-paradise
The article on Futurism is dishonest and inaccurate.
These are not wealthy individuals or underground bunkers and the residents turned against the fraudster property owner, not each other. These are above-ground bunkers which foolhardy preppers pay exorbitant sums to lease and the owner of the site is basically committing fraud by promising features which will clearly never be provided and by evicting anyone who gets upset about that, while keeping their money.
Read the article I linked for all the crazy details on the many lawsuits against him.