The purpose was to convert most of population to christianity to achieve cultural unity, and the ones who wouldn't convert had to leave. Usually it is explained

The purpose was to convert most of population to christianity to achieve cultural unity, and the ones who wouldn't convert had to leave. Usually it is explained only as an expulsion of the jews. P.D: there are many theories around Gibraltar, specially since it was during succession war and the country was in a civil war.