Jehovah's Witnesses all over the world have been destroying religious artifacts for decades. In their own home - historical items of value to their ancestry.
I am sure that the majority of us, if not all, have destroyed something we thought was demon possessed at one time. Items of questionable origin - that we thought were pagan. I have. Years ago. When I still was bound by the superstitions that the WTS taught me. My older brother burned a cross that hung on the wall of an apartment he rented - it wasn't his. A beautiful cross
We all did it 'behind closed doors' - items that belonged to us. And sometimes that belonged to other people.
The accused JWs in this case are acting no differently, if true - they destroyed something that they thought belonged to them.