Tegularius
If it gives them a feeling of security and community then the supernatural, though it be a lie, serves a purpose. No sense letting the truth intrude upon such good feelings unless there is no choice. From the beginning civilization has proceeded in that manner and for good reason; it's also why Jesus in a modern secular society remains active in so many contemporary minds.
I don’t know about it being “a lie”. But I do have a pretty good idea about human nature. Jesus, regardless of whether he (as the son of God) was real or not – works. And has worked for over two thousand years. I would hesitate to dismiss that. Yes, his doctrine has been misused, but not in all cases. "He" has done wonders for some people both personally and interpersonally.
No doubt atheists would be ridiculed or worse for not believing in the supernatural. Consider Islam! But such societies remain ensconced within a medieval perspective where the supernatural still has potency. One may believe in the supernatural, but there has never once been any validation for that belief. It may be trite to say, but the supernatural amounts to nothing more than the human tendency to expand itself beyond how reality is defined which rarely offers consolation. Insofar that's successful it serves a purpose. In life, it's sometimes better to negate or ignore the truth and arrive at one's own which makes living easier making truth simply a word easily dispensed with in the service of life. What nature has created it can't disclaim only destroy if it fails. Truth is a word based on dogma; nature is what it is without it.
I can’t fault your reasoning, but from my perspective, it’s not as cut-and-dry as that. The supernatural can only be validated by testimony. Which, in the mainstream Western society doesn’t have factual veracity. It's up to us if we believe or not. So I guess that if it does exist, the only way it could be validated is by a method of detection that it is not subject to - empirical science. Which is impossible. In this case, atheists will always have the upper hand, in arguments of this ilk. Fundamentally, because there is nothing perceptible that is supernatural to point to with our five senses. I'm not arguing for faith, God forbid. But I mean, who knows what the extent of reality is - I like to keep an open mind.
Theists believe, agnostics ponder and atheists analyse. A little bit of each should get us the right answer.