Yes that's Trump's comms strategy in a nutshell. He is perhaps the greatest root cause of the proliferation of conspiracy theories and culture-war gaslighting in recent times.
The final part above is the problem. You start to question both the dubious sources and the trustworthy ones until you become so distrustful that you don't know what to believe any more...so you believe nothing but him and his people's BS. He depends on that.