Not for nothing, but speaking in tongues is demonstrably bullshit. It's been studied linguistically and neurologically, and been found to be wholly non-miraculous.
Well, no. Plenty of things have been, and still are, unexplained, but that doesn't mean they violate the laws of nature. It just means our understanding of those laws is incomplete.
Like 3,000 years ago, a total eclipse would have seemed miraculous, but people of the time just had not yet mapped orbits and the planets.
In this case, glossolalia is a phenomenon that has been well-studied and found to be entirely mundane. They are not speaking foreign languages they had never heard before, they are not speaking new languages, they are not making phonemes that they have not heard before. Anyone can learn to speak in tongues, even if they do not believe in the spirituality of it. Neurologically, someone speaking in tongues is fully conscious and totally in control.
There are no cases of spontaneous glossolalia in groups that are not familiar with the experience.
It's weird, for sure. The people doing it seem to sincerely believe they are doing something. And there's no correlation to neurological conditions or mental illness. Functional MRI exams show that it isn't always controlled by the same part of the brain responsible for speech.
It just seems like people can learn to convince themselves that they have the magic power to talk weird and believe that they are channeling some supernatural power. They are not channeling any supernatural power, they are just making weird noises.
Depends on who you ask. The Catholic Church will claim rigorous evidence of it's miracles, especially the ones that lead to sainthood.
Of course, they don't respect the scientific method, so what's the point of trying to have a serious investigation if the methodology is going to be biased and flawed?
There are a lot of aspects of the world that are wonderful, can't yet be explained, and maybe don't even need explanation to be worshiped and enjoyed. Religion is just a means to make sense of these parts of our cosmos (I myself am a complete atheist, but have friends whose lives have been definitely enriched by finding religion). The problems arise when manipulative people codify these beliefs into regimented systems of control. That creates an incentive to coerce others to follow the same beliefs. That in turn leads to religions beginning to be shaped by a kind of memetic survival of the fittest. Some religions try to short-cut the hard work of having actually good ideas that improve people's lives, by instead coercing people into beliefs that maximize birth rate and reduce individual thought.
Isn't that most religions? You have the sacred knowledge of the divine will of the creator and ultimate judge of the Universe, who is also your close personal friend. You telepathically communicate, and He tells you that everything you already think is correct. Whatever happens in your lifetime, you're going to hang out with Him behind the velvet rope in the afterlife while all of your enemies are tortured for eternity.