The whole of planet Earth is like a sailing ship. We are on board this ship traveling incredibly fast through the vastness of space. Without the life support this ship affords us we would all die.
Countries are also like ships. We travel through our lives on board the ships that are our respective countries. The conditions on board our respective ships affect us a lot. If the Captain or the officers want to hoard rations or act like tyrants, or make bad decisions about supplies and living conditions, we all suffer for it. Anxiety between crew members goes up, anger and hatred can start to brew. It’s even possible, if not probable that mutiny will start to enter some crew members’ minds.
If other ships start experiencing shortages with rations or deck space, or if there are some other conditions which undermine the quality of life: the crew aboard those ships suffers for it. If we affect their quality of life by: firing upon their ship, poisoning their food/water or otherwise shorting their necessary supplies, or by encouraging and/or supporting their Captain and officers to hoard or behave like tyrants: then sooner or later members of that crew are going to start either engaging in mutiny or jumping ship…or both.
Something I think we very much need to keep in mind is the inescapable law of reciprocal action that exists in our world.
The ones who jump ship are going to look for another ship to climb aboard. They have no choice. If our ship is in relatively good shape, and is close enough, they are going to try to climb aboard our ship. We can count on it. Once aboard they will use our rations, our food and water and gear. Some (most?) will also try to work and help keep things going. If there are enough rations and accommodations, we’re all fine. If not, eventually there will be shortages. When there are shortages, tension, anxiety, fear, and anger will escalate. Or if we start getting all uptight with one another just because of our differences, then we’re also in trouble. This brings up one aspect of this subject which is more difficult, maybe the most difficult to resolve: do the “refugees” have the right to expect the host culture to change to accommodate aspects of their culture? Does cultural change, on anybody’s part, need to happen at all? Regardless, there are certain rules aboard every ship that everyone needs to follow in order to prevent chaos and disaster.
Finally, there is no question that if too many climb aboard our ship it will destabilize. We may even be threatened with capsizing.
It should be clear that it is in our best interests to do what we can to support genuinely good, healthful living conditions for the crew aboard all ships.