The basic idea is a simple one: The diplomat should not be at the mercy of the host state nor should there be the possibility to arrest the diplomat or his fami

The basic idea is a simple one: The diplomat should not be at the mercy of the host state nor should there be the possibility to arrest the diplomat or his family on trumped up charges. Diplomatic immunity allows the diplomat to live and do as he could and would in his home country. It also allows for the diplomat to be in the host country even during times of strained relationships or even war. It allows western diplomats to commit crimes such as serving and drinking alcohol in states where alcohol is considered a forbidden drug. It also allows diplomats to misbehave badly and go fishing without permit :)