The War on Terror changed many procedures regarding how countries deal with individuals accused of terrorism. Most of these individuals are viewed as enemy combatants. This designation removes said individuals from the protections of the Geneva Convention. They are not entitled to a speedy trial and do not have access to the civil courts and justice system. Most of these individuals are indefinitely detained. Those opposed to these policies argue for the importance of humane treatment of prisoners and due process.
I believe the answer to this question is to stop the spread of Communism. If South Korea was taken by China and North Korea, the "Dominoes" might start falling and other countries might want to become Communist. Great Britain, the USA, Australia, and other counties lend their support to stop this communist spread.
