Yeah, nice ramble, but still....no. I don't acquire a burden of proof simply for stating something in casual conversation. Unless, it is something intrinsically outlandish and prima facie implausible, like taking the world's biggest shit, or breaking the Guinness World Record for a motorcycle jump, or having the world's largest cock.
You can believe whatever you want, no one is disputing that. But if you accuse me of being a fraud, you need to back up your accusations with solid, tangible evidence. Not act as if I've acquired some arbitrary burden of proof due to your angry squealing.
If you just admit this is your personal belief which you don't have any tangible evidence for, there's no problem. If you're gonna throw accusations around, that's a different story.