I think and hope that everyone agrees that anyone who needs insulin should get it.
While I completely understand (and encourage) people to do what they need to survive, I can also imagine that two or three unscheduled busloads of Americans to a smaller border town, could conceivably impact the short-term supply of the local pharmacies.
There’s no question that there’s more where that came from. It’s also not the biggest problem in the world. But it’s not a great situation, or one that would benefit anybody concerned if it was long term one.