Leave the xenophobia and paranoia behind. There is an issue with port security, and it has nothing to do with P&O:
"A study completed last year by the Coast Guard and the U.S. Department of Homeland Security identified 66 of the nation's 359 ports as being especially vulnerable to terrorist attack. But while the country has spent $18 billion securing airports since the terrorist attacks of Sept. 11, 2001, it has spent just $630 million to improve security at the nation's ports. The Department of Homeland Security's Inspector General last year sharply criticized the port-security program, saying it didn't direct funds to the most vulnerable ports and compromised the nation's ability to stave off terrorist attacks."
Can we please tackle the real problem with as much intensity as we tackle imaginary ones?