This article does a fair job of presenting the problem, but without proposing any solutions.

Here are some questions:
1. Does any country in the world allow unlimited entry, without passports, without customs, just walk across the border?

2. Would you let just anybody walk into your house, raid your fridge, etc. even when you were not home? You have to counter that argument.

3. How do you control the internal fanatics and idiots? Nothing is foolproof.

4. That manifesto demonstrates the height of ignorance about race. Do you take DNA samples from everyone in the world to classify them? Looks, by itself, won’t work.

Finally, early in the internet, there was a term “Look/Feel” for copyright laws. Trump’s Look/Feel is no different than many of his opponents when seen from an unemotional, neutral view.