And yes, if I entered another country illegally, I would fully expect to be locked up until I could be repatriated, whether in a jail cell or a cage, and they would be fully justified in doing so.
Because sovereign nations have the right to decide who is and who is not allowed across their borders, and they also have the right to take reasonable measures to expel those who are present in their country without permission.
Why?
Because sovereign nations have the right to decide who is and who is not allowed across their borders, and they also have the right to take reasonable measures to expel those who are present in their country without permission.
Again, why? Who are they harming, and how?
Already answered, it doesn’t matter, and it doesn’t matter.