Should it be a crime to express approval of a terrorist organisation targeting your government and fellow citizens?

Should it be a crime to express approval of a terrorist organisation targeting your government and fellow citizens? http://t.co/ACyv4n4KLq

— Claire Khaw (@ntfem) August 9, 2015

I would suggest not. Those who do stick their neck out to say such things will have sacrificed their reputations and livelihoods in order to do this. If they are prepared to make these sacrifices to make their point, shouldn't we take the trouble to listen to their arguments?