Of course this is circular reasoning. It's precisely because America deploys Marines everywhere that Americans NEED to be rescued. Their country's actions make them targets.
In general, Americans have been seen as targets for a long time (even when foreign relations were good) because they were seen as 'rich foreigners.' My grandpa would even say that when going back to Poland to visit family, there were a lot of people that were just looking for hand-outs that assumed he was rich because he was an American (he was not wealthy by any stretch of the imagination).
And even the sitation in Cairo wasn't as bad as reported in the media (at least according to what I've heard from the people who've been stuck there).