This was a good and short interview, but I don' t think most would find this surprising in the least. Police should be doing source work like this, it is expected, and the only sources that will have valuable information will have to be part of the community for the threats emanates from.

I think much of the same happens in the U.S. for the same reason, most Muslims don't want extremists putting them at risk directly and indirectly (anti-Muslim backlash after attacks), and they disagree in principle with the extremist methods and desired ends.

What would be refreshing to see is an overt movement of Muslims actively opposing the extremists, shaming them, making it undesirable for their children to be attracted to their narrative. Until that happens the significant threat of Islamic extremist based terror will persistent.