Wrong - what I mean is...
There are 4 possibilities:
1. We shouldn't attack but we do.
2. We shouldn't attack and we don't
3. We should attack but we don't
4. We should attack and we do
Now, putting no faith in Bush alone:
1. If no one protests, we will attack whether we should or not
2. If we protest, we may still attack whether we should or not. We will never know if it was the right decision.
3. If we protest, we may not attack. Not necessarily because Bush will change his own opinion.