The behaviour of the Channel Island's populations is often brought up in these sorts of discussions but does overlook some salient points;
Firstly the islands are just that and small, Jersey is a tad over five miles by ten, with no large areas to hide out in or borders to escape over.
Secondly as the only part of the UK captured by the Germans it was a trophy for Hitler and more heavily fortified than the French coast.
Thirdly the ratio of occupying troops to inhabitants was in the region of one to seven.
Combine that with the fact that most of the local population knew each other by sight if not personally.
This makes it a lot harder to infiltrate strangers to organise resistance.
If the area had been, say the size of Wales it might have been different. Who knows?
ETA
@Ho2331 It would be interesting to see a book like Deighton's 'SSGB' set in the Channel Islands. 'Kramer's War' by Derek Robinson is a good read on the subject.