I think most people are confused at how someone could expect to have their freedom of speech protected in a country controlled by China. Territories controlled by mainland China are not usually the first places you think of when you think "need to flee the US government".
Similarly, I think most people are surprised at the ability of someone in his stated position to gain as much access as he said he has, and also at the reported size of his salary - because they are not familiar with what the salary scale is like in the world of government private contractors.
Having questions is not the same as smearing character.