"The nature of Muggles..." Oliver trailed off, looking uncomfortable. Intellectually he had been aware that it could only be a matter of time before the children got indoctrinated to hate and distrust Muggles but now that it was actually happening, it still came as something of a shock to him. Oliver sighed, suddenly tired. If the indoctrination began now, then it would take years - if it was possible at all - to convince the children that Muggles weren't the source of all evil. The future looked pretty bad if this was allowed to continue. Perhaps he should inform the Order about this.
Oliver opened his mouth to reply, but couldn't come up with a single halfway intelligent thing to say that wouldn't either be a flat-out lie or would land him in a holding cell again.
Instead Oliver nodded thoughtfully. There had to be a way to show a different side of things. That particular way started to look increasingly like Lee and his little project.