Clearly humanity benefits much more from SpaceX than from the 26 local residents. And yet it is their right to live there without restrictions and control. Why was SpaceX allowed to introduce dangerous elements( rockets that explode, chemicals ) to the vicinity of a residential area, especially since the area was there first? It doesn't seem moral and I wonder how many laws were broken( read: circumvented and bought ) in the process.

If I remember correctly, SpaceX lobbied for a law that would allow a temporary closure of the Boca Chica beach, and got it.