This is the point I agree with most: Although even a beginner should be treated with respect regardless, we’re all human beings here.
As to this, optimism is always good but we shouldn’t try to tell him that his idea is entirely possible. Instead we should either point him to the tutorials he wants or other beginner tutorials. Decent MMOs are next to impossible to make by yourself, there’s no way around that fact.
Again, In my opinion, behavior like this is worse then the person who asked the question in the first place.