President Trump said he issued the travel ban to protect our country from terrorism.
However, Judge Watson found that the latest version of the travel ban contains "internal incoherencies” that undermine its rationale for protecting national security. Some countries appeared to fall below the security criteria that were used to evaluate countries, but these countries weren't included in the travel ban.  The incoherencies make sense when you understand that the real purpose of the travel ban is to pander to white supremacists and other racists.