You would be fine to mention this if you also balanced it with other examples, such as: - We were only in Argentina because we invaded it. - We only had control over Hong Kong because we wanted to keep our opium trade open and thus we invaded it (First Opium War http://en.wikipedia.org/wiki/First_Opium_War) - We were only in America because we invaded it. - America were only in Vietnam, because they justified invasion aftera false flag operation (Gulf of Tonkin incident, http://en.wikipedia.org/wiki/False_flag). - We were only in Australia because we invaded it. Yes, muslims invaded spain, but they didn't ransack the place and cause genocide like our examples. In fact, they did this when we were in our 'dark ages' and in reality it was the 'age of light' in Spain with massive advances in science, and municipal services e.g. sewers, water, lights etc. not to mention law and order.