This sounds like what might happen across the border between Israel and the Gaza Strip. But it's happening right here in the United States.
U.S. Border Guards, under increasing attack from those throwing bottles, rocks and other debris at them from across the Mexican border, have begun retaliating by firing tear gas into the crowds in Mexico.
If the Mexican authorities do not control the people on their side of the border (and increasingly they've shown no interest in stopping illegal crossings much less this!) then this has international incident in our future written all over it.
What will these border guards be expected to do if and when the Mexicans trade in their bottles and rocks for guns and bullets? It's likely they will fire back. And it's likely there will be casualties, perhaps on both sides of the border.
Respect for the boundary of the United States is continually eroding. We Americans are expected to welcome people who have entered our country illegally with open arms.
Children push the limits of what is acceptable behavior all the time. It's the job of parents to set and maintain boundaries. If they don't, things get out of control at home.
This applies, as well, to physical boundaries. Either the boundaries of our nation are maintained. Or things get out of control at home.
I predict that if things escalate and gunfire erupts, there will be a significant number of Americans (some, perhaps, officials) who will publicly and seriously question the actions of the border guards defending themselves.
Mexico must be told in no uncertain terms that it MUST stop these attacks on OUR representatives on OUR soil. Or face economic and diplomatic recrimination.