It is a sensitive topic, actually. Specially in the United States and Europe.
On one hand, there should be clear and strong immigration laws and legal path for those who seek to move into a new country in the correct way, on the other hand those who are desperate enough to risk their life and freedom also are supposed to be considered, they are human beings after all.
A Border is not only about drug smuggling or illegal activity, there are also cultural and human barriers which should not let us forget we all bleed and suffer the same way as human beings.
No country is stopping immigrants but it has to be done the right way, those who are desperate due to no documents or financial constrain should remain in their country because going into another country you don't know anybody can lead to different crime just to survive.