It seems the Paris gunmen financed their spree themselves and bought their guns (for a lotta money) from a Belgian criminal supplier.

Other conflicts must be funded from "somewhere" due to the sheer quantity of weapons and it wouldn't be funded by anyone who wasn't a follower of the religion at the forefront of all the radical unrest.

The thing is, in a supposedly "settled" Western country, you don't really need to do much in the way of "terrorism" to cause, well, "terror" because the mere suspicion or threat is enough to cause a lot of expensive disruption which is what the "terrorists" intended as an early step along their intended path of destruction of the Western culture and a return to uncivilised oppression.