Prove me wrong, or check your assumptions at the door next time before you go thinking gods must be supernatural.
I think one of the main reasons you don't see much movement in (what you probably feel is) disrespect of these beliefs, is that there isn't a big push one way or the other on these ideas. You don't have a whole lot of people adhering to these models of worship, so not only is there not a large group advocating for anything regarding the belief-systems, there is literally no "threat" to believers in major religions, or non-believers of religions (think "creationism in schools" kind of threat). Like it or not, that's where you're going to see a lot more action - because of the numbers those wheels are just a whole lot squeakier.
You're also not going to find a lot of other types of (other) theists or atheists really worrying themselves all that much over what you want to call "god" that isn't a claim to something we currently consider "supernatural." I'm certainly not going to try and disprove "nature" for example - there is no point whatsoever. I would be more one to argue that it has no effect to call "nature" by the name "god." You're not making any fantastic claims there that anyone is eager to try and knock down or help you support.
And the example in which someone calls one of their ancestors, or themselves "god" - they most certainly pose no threat to any other major belief (or nonbelief) system. Again - why would anyone challenge or even address these people's beliefs outside of some specific degree of curiosity? They are literally out there, "on their own", with a belief that is ultra-specific and personal, and they have to know that.
Lastly, not even fringe activities get the kind of "respect" you seem to be expecting here. Think on the lines of some obscure miniature-figurine board game that a handful of people are putting their life savings into collecting and painting every figure in the game's "universe". Sure, it's great for those people who get involved... fun, brings them together, whatever... but almost no one who doesn't play cares if they even know the name of that board game. Why should someone's belief system be treated so much differently than a hobby to others who have no intention of subscribing, honestly? In your estimation, are people allowed to
not care about information that is not important to them?