I think the question muddles together a few things, and then attempts to perform logic on them. Here's what I mean: "Ignorant" is, like most words, a multipurpose term. It means different things in different contexts. Its meaning depends on who is using it and what they're trying to convey. When you say "everyone on Earth is ignorant", I infer that you mean "nobody knows everything", which is clearly true. However, when (for example) Mr. X accuses Mr. Y of being ignorant, because Mr. Y hates the Chinese with a blind and aggressive form of bigotry, it's perfectly legitimate for Mr. X to use the word without being guilty of hypocrisy. In this case, Mr. X is pointing to the ignorance of prejudice -- using a broad and oversimplified concept about others as a big "bucket", and dumping everyone into that bucket indiscriminately. It's ignorant, because it IGNORES the detailed, individual differences of each particular person of Chinese descent, and because it has a "dumb brute" quality -- a radical oversimplification performed to save the trouble of critical thinking. So the ambiguity about the word "ignorant" is what allows the question to SEEM reasonable. However, there is a valid point nestled in the question: we all need to keep returning to self-examination any time we start criticizing others. It's very easy to project our own weaknesses and shortcomings onto others and "punish" them to divert attention from ourselves.

everyone on earth wants to believe that they are not the bottom of the barrel

Ignorance to me means unaware, unknowing. It is true that we are all ignorant about something... but we are not all ignorant of the same things. If we never judged a person ignorant, we would never have the desire to educate them. We would never have the desire to remove the ignorance. Because we are ignorant of different things, we have all have information that could be useful to someone else. If nobody felt compelled to share information because they weren't 'qualified' because of having some form of ignorance, everybody would be even more ignorant. This is different than being a hypocrite. Calling someone ignorant in a blanket statement would be hypocritical because we are all generally ignorant. But being specific to the ignorance is not hypocritical if we are not ignorant to that specific topic.