When I read your discussion and the word tolerance, I did not believe that tolerance meant acceptance.

In fact, after checking a couple of dictionaries, I saw that the definition did not include the word acceptance.

Also, acceptance is not a synonym of the word tolerance.

There is one medical usage of the term tolerance:  Acceptance of a tissue graft or transplant without immunological rejection, e.g., the patient is tolerating the tissue transplant.

There are things that I tolerate, but I am not happy about having to put up with something or someone who bothers me.
Tolerance is an attitude that we agree or decide to have related to:
-  allowing the right of something that one does not approve
-  the views and actions of others
-  conduct with which one is not in accord.

But if we tolerate something or someone, it certainly looks like we are accepting it (but that is usually not the case)

For example:

I tolerate my noisy neighbours but I don't like it.

I hope you find my comments "acceptable" (or at least tolerable  :-)

I think the tolerance is the act of accepting something different from you. (it needs to be something different from you, because if no, it can't be considered "tolllerance"). 

I have two thoughts about it: 

1. Sometimes toleration is bad, because it excludes the confrontation, which is (many times) the basis of our knowledge

2. Young people nowadays (in Europe, at least) don't tolerate the non tolerance of something.