What are the limits to putting faith in freedom of speech?

News item: B’nai Brith Canada calls on Toronto police to investigate display of flags of all banned terrorist groups…..

…But such differences aside, I find B’nai Brith’s position an interesting problem for us free speech advocates because in thinking how best to defend free speech I don’t think we can have any general rules or principles that should be thought always to apply in all imaginable situations.

I don’t think the same degree of freedom of speech needs to be granted to imported revolutionary ideologies as we might grant to our home-grown would-be revolutionaries.

Covenant Zone asks some interesting questions.