To demand tolerance is to deny all moral standards in the name of a moral standard; an inherent contradiction. Advocates of tolerance then screech against moral relativism; the very thing that tolerance inevitably increases.
Even worse, the more a society exercises tolerance the worse people's behavior gets, so that the environment is made intolerable by tolerance itself.
Eventually, someone asserts a standard at the point of a gun, which is how all standards, even standards requiring tolerance, always worked anyway.
Mandatory tolerance produces its inevitable opposite.
Ultimately, an appeal to tolerance is an appeal to laziness.