I am not a Christian any more. I have been around a lot of religious people of different faiths since leaving the WTBTS organization.
I compare how my friends of other faiths talk and behave to how JWs I have known talked and behaved.
I have heard MANY JWs blame something on demon influence. THe only other people I have ever heard do that were practicers of black magic. Some of my (former) friends practice Santeria, others are practicers of witchcraft (real witchcraft, not that wicca nonsense).
The southern Bible thumpers that I know praise Jesus all the time and give Jesus credit for everything good that happens to them, but I don't remember them blaiming demon attack or demon influence for everything that befalls them.
The JWs also credit angels for looking out for them and for protecting them. So, when things go wrong, there has to also be a supernatural reason.
In my opinion JWs are superstitious to the extreme of it being almost a mental disorder.