lilithu said:
This may be semantic but I don't understand the bolded line. Tolerance literally means allowing or permiting.
"Literal" meaning is a very questionable idea and I don't recommend getting hung up on it. The meaning you're describing is only representative of one limited syntactic environment, "tolerant
of X", and even then it is not wholly representative of that environment, as I will explain.
lunamoth was talking about the problem of
being tolerant, with no "of X", as in an adjectival predicate like "She is tolerant." or as a non-predicative adjunct like "She is a tolerant person." At this point, the synonymy you presented no longer holds; saying someone is tolerant is not the same as saying someone is permissive.
Now, it's quite unusual for a dictionary definition to be useful for really understanding meaning, but in this case the first entry for "tolerance" listed in the American Heritage dictionary actually captures this meaning quite nicely: "The capacity for or the practice of recognizing and respecting the beliefs or practices of others." Note that the words "recognize" and "respect" do not have any overlap with the meanings of "permit" or "allow" in typical usage.
Once a particular meaning of a word has been introduced into discourse, it can override the different meanings that word can otherwise have in different contexts. So once tolerance had been brought up in the sense I described above, the meaning of "respecting and recognizing" becomes transferred even to "tolerant of X", which in this case was "tolerant of intolerance." Note that this is specific to the context of that particular interaction, not a general redefinition!
So, in the context of lunamoth's post, my response was intended to mean, "There is a response to intolerance that, by failing to take the time to properly understand the other side, is not respectful and/or does not give proper recognition to those who hold the view that one considers intolerant. This is bad. However, by taking the time to recognize those who we disagree with as people who have arrived at their intolerant views through some kind of process which they believe to be cogent, and respecting their ability to reason and discuss these things, we can produce a response to their views that not only advocates tolerance but exemplifies it, and that doing so does not condone/permit/allow their intolerance." In other words, there is no contradiction between being a tolerant person and not putting up with intolerance, but there are ways to go about it that are more tolerant (in the second sense) than others.