No, he didn't. If he did think that wouldn't our forces have been on alert I'm sure he thought one of the outcomes might have been war, but that result was not inevitable.
In your world view what purpose does diplomacy hold if the end result is always war (as it was in WW2, Iraq, etc.)?
You are misquoting. I said that IF diplomacy did not work, war was an option. If the UN were not so limp dicked, it is possible that it would have worked against Iraq, but they have a precedence of being flacid when faced with conflict.