British practised "divide and conquer" globally, even in Europe. Less known is that AQ Khan (Pak nuke spy) was under CIA auspice and support in gathering nuke secrets from Europe. Perhaps he also was CIA/MI5 agent. Missing nuke ingredients Khan got from China. Remember, Pak-China was an arranged marriage by CIA to push US coldwar agenda against USSR, Afghan, Vietnam and ultimately India.
Since we are talking about Mussolini and he being an agent of MI-5, it may be a good idea to look at some relatively newer history. Is it possible that GORBACHEV was an aget of the CIA?