While I have no idea why people believe these things in the first place, it's a safe bet, with few exceptions, that whatever one believes in, it was passed on from the parents.
You have a way of injecting atheistic arguments into a debate naturally. You have thrown this severally before so am surrounded picked it up somewhere; that since beliefs are essentially 'inherited' they are biased.
First, note it equally applies to atheism. Communist countries are good examples. Not only is there absence of theism, there is clear teaching of atheism, no-God which is passed down.
Secondly, any belief system must necessarily be passed down by others. Take education. You can't possibly make a serious case against knowledge since it was largely passed down to you. Very few significant changes in the body of knowledge. Supposing you was God, how would you communicate religion and your dictates to men?
Ok, I see what you mean, since humans learn from other humans, be they parents, teachers, peers, book-authors...etc etc.
Take for example our online debates on scientific topics. None of us has sat down in a lab or whatever and tested E=mc squared or whatever. We just believe the books that the scientists have written. Personally, this is why I find accusations of "arguments from authority" somewhat silly unless I am talking to an actual physicist or biologist or whatever, and at that, one who himself insists only on speaking on the basis of his own experiments or those he has personally authenticated/replicated. It is not to call someone unintelligent that I dismiss the assertion, it is just to point out that the person is debating me on the basis of arguments from authority, even while he points out that my argument is from authority. But I think that as long as we insist on arguing about topics about which we cannot even pretend to be experts, it is only logical, indeed necessary, that all such discussions can ONLY proceed on the basis of "arguments from authority". Or perhaps I find it easier to think this way because my own profession is about making arguments from authority, be that the law-maker, custom, books of professors...etc.
Here is how I understand argument from authority. A certain big name supports an idea, therefore it is valid. That is how I understand it.
When one refers to scientific consensus, it not just on the basis of unfounded belief in the authority of the figures behind it. At least not in my case.
There are principles set in place by a history of observation. While they are generally accepted, they are not set in stone and one is absolutely free to challenge them.
Suppose I have a degree in physics(which incidentally I do), is that enough reason for anyone believe anything I say on the subject? Should I tell people to zip until they get a degree? Can I not be wrong on the subject?
The best software engineer I ever worked with was straight from high-school(never set foot in college). Should the yahudi zip his mouth and ideas until he gets a degree?
I think the way to go about it, is to justify whatever you are saying whenever asked. One can spot argument from authority from 73(just a random number) miles away.
In the information age, I believe most knowledge is out there in plain sight for anyone interested in putting in an effort to learn.