With the above tweet, President Trump has expressed what no doubt millions of Americans believe. The United States is a sovereign country, and like all sovereign countries, has laws governing who comes here and who lives here. It is not some kind of free resort promising happiness and comfort and health and attention to all the needs and aspirations of any and all who sneak across its borders.
If you are a citizen of another country and you see that in America you will not be treated with all the solicitous care to which you feel entitled, STAY HOME. We are not here to attend to your wants.