I think you're taking his analogy a little more strongly than it was intended.A person can avoid having this happen by avoiding needless, over the top analogies and outlandish rhetoric.
If one wants to be critical, be critical. I doubt that will cause many problems. I have been critical several times over many months, and only once did anyone give me guff about it (and that person was as easily handled as Rusty is easily handled).
But if one wants to overstate their case, one is likely to be called on it and categorized. You might not like that, but it is what happens and I am not sure it is wrong that it does happen.