I have to be contrarian here. If the people are US citizens and are not linked to any terrorist groups, and are obeying the current laws regarding zoning then they have every right to build/rent or buy property as any other citizen does. Presumably someone sold them the space.

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.