I was just bringing it up to get an admission that "there is a line". Everything else is about debating where that line is. The old ACLU set it really far into the "freedom" zone - recently people want to restrict it more, by for example talking about classifying relatively generic/common/vague speech as violence, when previously only direct incitement to violence was considered beyond the line.

My main point was that the GGP's concept of tolerance, as something which can have no line at all, has never been the case in the US, and doesn't seem advisable, since his argument that any resistance is invalidation of tolerance would lead it to be easily destroyed.