That doesn't give non-believers the right to harass and attack believers of "A" whenever they feel like it. If believers want to build monuments to "A" with their own money, why not? If they want to celebrate the birthday of "A" with their own rituals, let them. As long as they aren't forcing non-believers to pay for those monuments or participate in those rituals what harm is done?
Most believers already feel that their case has been proven. 5000 years of human civiliation is their proof. A 2000 year old book (or maybe only 1500 years or so) is their proof. If we don't choose to accept their evidence, their proof, it becomes incumbant upon us to prove them wrong.How can anyone disagree with that? But until the existence of those "objects" could be proved, the suggestion that they did exist was nothing more than a hypothesis, and it was perfectly legitimate for other people to doubt, deny and ignore them until the proof was presented to them. The "believers" had to prove their case, not the other way round.
I accept that belief in "A" is wholly tenable if there is a body of experience and evidence suggesting that it exists, but no-one should claim that this is proof positive of "A's" existence. It's still just opinion or belief, whether likely or not.
That's rather condescending. One can only be gullible or deluded by believing in something which flies in the face of proof, not by believing in something for which there is no proof one way or the other. Believing that the moon is made of green cheese or that the Earth is flat is deluded. Believing in God is faith. There's no proof one way or the other, and only one way (presently) to learn the truth.OK - if not gullible, deluded.
There may be thousands of explanations which you feel are better. Those same explanations may seem worse to someone else. It's all subjective, because there is no proof one way or the other. It's a matter of personal opinion, based on whatever existing evidence one believes in.As for people who have "experienced" the existence of "A", while that might convince them personally, it does not count as proof for others. That experience might be the real thing, but there are probably many other explanations that are just as good or better.
In which case, your opinions, and mine, are no better or worse than anyone else's. Without proof, one way or the other, they are only opinions, or beliefs.