No idea what a kusbara cultivators are, but imo there's no chance the tunnels are bomb shelters.
"The Palestinians use tunnels? So did my heroes, the poorly armed fighters of the Warsaw Ghetto. Unlike Israel, Palestinians lack Apache helicopters, guided drones, jet fighters with bombs, laser-guided artillery. Out of impotent defiance, they fire inept rockets, causing terror for innocent Israelis but rarely physical harm. With such a gross imbalance of power, there is no equivalence of culpability. …" Dr. **or Mate
