Andy,
An assasination is what happened to Martin Luther King or JFK. Osama was a TERRORIST.
'Assassination' depends on the person, not what they did, PW The dictionary definition of the word is:
the murder of a famous or important person, especially for political reasons
(
Macmillan Dictionary Online)
Assassinations are usually 'sponsored' by organisations or governing authorities.
Those verses do not tell it only applies within one states borders. Did I miss it?
Yes, you did. The passage is within the context of paying taxes and therefore refers to a nation's policies. I am British, and unless I hold property in the US or Canada (which I don't), I am not answerable to the US or Canada when it comes to paying tax. Similarly, as a Briton, I am not bound by American or Canadian law unless I happen to visit the country.
This was an extra-judicial killing, carried out by forces of one country on a citizen of a second and within the borders of a third.
What message does that give to terrorists and, in all honesty, what makes it any different to the extra-judicial killings carried out by citizens on one or more nations, of citizens of several nations, within the borders of what (for many) was a third nation on 9/11?