Here's an interesting comment I've read on this issue from a local forum:
"The big fuss in the US is about how dare the US President order the murder of a US citizen.
In fact that's they are the only ones he should be able to order the murder of.
How dare Americans think that there should be one law for everyone else, and a different one for them. That they should have rights but no-one else have them. That they should be arrested and brought to trial and given due process, but their President can summarily murder or lock up forever without rights or trial anyone who isn't anywhere in the world.
Americans really are the most arrogant people in the world."