For example, in 1942, Americans really were under mortal threats, but rounding up Japanese citizens and immigrants in California, stealing their property and immuring them in concentration camps was not an effective way of protecting anybody. It was racism.
Just so with Trump's idiotic motion against Muslims, on the grounds that some may be ready to attack Americans. It's true, some are. But then, so are some Christians.
The Supreme Cort decision (per curiam, but 6-3, showing that a minority of justices have not lost their heads), does nothing effective to protect anybody. The order reads, in relevant part:
The injunctions remain in place only with respect to parties similarly situated to Doe, Dr. Elshikh, and Hawaii. In practical terms, this means that §2(c) may not be enforced against foreign nationals who have a credible claim of a bona fide relationship with a person or entity in the United States. All other foreign nationals are subject to the provisions of EO–2.The Trumpeters interpret this vzgue order to mean, as close as your mother.
The flaw is obvious to anybody. Everybody has a mother, and everybody's mother lives somplace.
If she happens to live in the United States, that tells us exactly nothing about whether her child is or is not planning to attack Americans.