Because these so called "demonstrators" were trying to cross the borders from Syria & Lebanon into another country. Every country has the right to defend its borders. Are you telling me that if a mob of hundreds of Mexicans tried to storm the US border that the US would not do the same? You know full well the difference here between Gaddafi shooting his OWN people in their OWN country as opposed to people trying to run a border and cross into another.
Islamist militants attack African Union base in southern Somalia (Reuters)