I want to add to the paragraph where I said earlier that
... the border crossings can become very permeable over many years because the neighbouring countries maintain a good friendship and see no need for hostilities. They welcome mutual tourism and trade with each other.
They also welcome new residents, hence foreigners, as becoming long term members of their societies.
They cannot possibly maintain such welcoming culture when they are taking in masses and masses of immigrants in very short times, and are disabled of having a coordinated flow as in normal times, as a consequence. Which was my original argument.
Border controls are carried out at random in relaxed times, they identify the criminals and treat them properly strict. But they cannot operate normally if they are flooded with refugees and illegal immigrants. This is irresponsible towards both the locals and the immigrants. No one is being treated with justice or dignity here.
The fact that so many people are crossing the borders is a strong expression of dysfunction in the countries of origin of those seeking to enter the country. This dysfunction is not reduced by letting in all these people, on the contrary, it causes a never-ending stream of new arrivals. A neighboring country or the neighboring country of the country that allows criminals to traffic in people, brutalize its internal conditions and must not be further encouraged to simply get rid of this problem by treating people like cattle.