There is no goal to change minds, we are just exchanging views on reality.
Fair enough. In that case, I don't find any reason to accept views about spirituality as something more than simple emotional expression.
For me, truth is determined by objective evidence and testability. Opinions are those beliefs (ideas we accept) that cannot be tested or verified.
So, for example, it is my opinion that tomatoes are vile. Other people have a different opinion about this and there is no objective way to express this, so it is an opinion with no truth value.
Some people have deep emotional experiences that they label as spiritual. I do not deny that experience. But I am skeptical about the *interpretation* of that experience and whether it has an objective (i.e, truth) content, or whether it is all opinion (personal belief).
I don't hold the BB beliefs religiously. When and if evidence comes out that shows the BB model to be wrong, I will happily change my mind. But, given the weight of the evidence, I find it highly unlikely that the basics (expanding universe, for example) will be disproved. In that way, it is similar to my belief that the Earth orbits the sun and not the other way around. The cumulative evidence is so strong that any other interpretation is highly unlikely.
And, furthermore, it is my *opinion* that certain systems of belief are actually unproductive or even dangerous. This is a value judgement (like all opinions). Those belief systems that ask people to accept without evidence are much more likely to be unproductive and/or dangerous.
Those that can get us to believe absurdities can get us to commit atrocities.