Thanks for the links.
I doubt very much that insecurity in France due to religion issues is the main reason for the exodus in 2015. I would say that millionaires try to escape from the grip of the state and its taxes. This is not new.
Most exodus are from leftist countries because they have a tendency to view financial success as "immoral" and hence tend to tax more millionaires.
In general, money moves out much before people. Moving your home is really the last step after "everything else" is gone.
Pascal