didn't Boney - well as pure self defense of course, put together an army at the French coast with the intention of invading England?

I mean an invasion army, surly must be as it is intended to invade - for an aggression, but wait a minute, for Boney however this is totally different here invasion means self defense there England threatened to steam roll France.

You are right of course that Boney did not act in a politcal vacuum and the peace of Amiens, he regarded as an armistice anyway and for breaching the peace - it wasn't only the fault of the English, as any good history book will show.