Says who? Thinking you can die and being afraid of it is simply electrical impulses in your brain. No more or less valid than electrical impulses in a computation.
Sorry but if you step on a hose and the water stops running, that doesn't mean the hose was the source of the water
The materialist worldview is a fair null hypothesis, but it is not mutually exclusive with some higher-order thing we haven't discovered yet
You seem influenced by Dennett's ideas on consciousness. Not all of us are willing to accept that consciousness is 100% an illusion. Seems like gaslighting to me.