I agree with BradB's post, and would add:

1. When it comes to LEGAL immigration the USA is the most generous country in the world.

Through legal means the USA lawfully admits over ONE MILLION legal immigrants each year.
Which is more then the European Union, the Russian Federation, China and India COMBINED.

2. Throughout our nation's history the leaders understood, because they had brains, that legal immigration to the USA should be limited to people from
the UK and Europe. They did not want Balkanization that leads to conflict. And they did not want any stinking Muslims.

3. Then in the 1960s the Democrats got the federal immigration laws changed to make it so legal immigration emphasized immigration from the African and Asian and Muslim countries - because they would all become Democrat voters AND they would have no respect or care or concern for our Anglo-American historical, cultural, political, religious and legal system and traditions. So they would not have any respect or care for our Sacred God given Constitution.

And the Dhimmis want to speed the process of disintegration of our country by having an open door no border policy for the Mexican and Central Americans.

4. Ultimately this is all about the deep dark spiritual realities of this world. Someone wants a Globalist NWO of Babylon on Planet Earth.