Good point, but I'm struggling to remember people who were radicalised exclusively through ISIS websites. There probably have been a few just because there were

Good point, but I'm struggling to remember people who were radicalised exclusively through ISIS websites. There probably have been a few just because there were so many cases by now they all blur together a bit, but usually ISIS sympathisers seem to have been exposed to a lot of ISIS propaganda during sermons. They may also have consumed online content but it was in addition to, not in replacement of, traditional offline radicalisation.