Impurity of a Dead NonJew

 Or HaChaim (Bamidbar 19:02) Let us assume that we have two containers inside a house, one full of honey, the other full of refuse. If you take both these containers outside it will be observed that the container full of honey attracts swarms of flies whereas the number of flies which are attracted to the container full of refuse is insignificant by comparison. Similarly, when a Jew dies, the fact that he was full of holiness while alive -i.e. sweet as honey,- now attracts all kinds of spiritually negative elements seeing the soul has departed from that body. These are the forces of impurity which always attempt to attach themselves to anything sacred as they wish to benefit from the physical sweetness of holiness. This is the reason that the body of a dead Jew confers impurity on any other Jew who is under the same roof. This is so even if 1000 houses attached to each other surround the room in which the dead body is kept. As long as one door opens into those houses the impurity is spread throughout the airspace in all these houses. The same does not occur if the dead body is not that of a Jew. This is because the Gentile never possessed holiness while alive so that the spiritually negative elements have no reason to think they would benefit by attaching themselves to it. The body of a dead Gentile confers ritual impurity on a Jew only if the Jew touches it, etc., not if he merely shares the same roofed-over airspace with it. The only impurity which does cling to the body of a dead Gentile is that which is capable of killing on contact. The root cause for all these rules is the Torah which was given to the Jewish people.