I think the very definition of Christianity is that you are accepting the creed on faith. There really aren’t any claims you can verify or falsify until after you die (or during the special time of the Rapture).
This is false. There are thorough proofs (or, to avoid the success-word, attempts at proof) for God's existence. They are ignored or misunderstood by the popular atheists like Dawkins and Dennett. They are impossible to summarise in a combox or pithy comment but the information is out there if you care to look. [0]
There are also miracles with thousands of witnesses, most notably that at Fatima. The witnesses included not just Catholics, but also Protestants, atheists and those of other religions. https://www.basicincome.com/bp/files/Meet_the_Witnesses.pdf
Personal revelation requires no faith. Such evidence might then rationally lead to belief, like any other anecdotal conviction. That it provides little external evidence is just unfortunate for the rest of us.
That's not the definition of Christianity. Catholicism has a long philosophical tradition discussing the existence of God, and that tradition is far from refuted.
Mathematical proofs need no physical evidence. They're saying something similar is accepted by some Christians. That's an internally consistent viewpoint. Us skeptics simply misunderstand their irrefutable logical proof.
You appear to be shadowboxing an argument where no arguments were made. If anything in my observational comment strikes you as remotely controversial or contradictory to yours, something has gone awry.
Well, there are some atheists that argue that God's omnibenevolence is incompatible with the evils in the world, meaning God cannot exist (or at least, is either not omnibenevolent or not omnipotent, and if these are part of the definition of God, then God insofar as the term refers to something with at least these two properties, does not exist). Theists have responses to this argument, but the point is that the subject matter is something that can be rationally discussed.
Sure, I've engaged in similar discussions in philosophy classes, but this was always about whether a specific definition of "god" could exist and lead to discussion like "can God make a rock so heavy even they can't lift it".
It never has lead to a point that proves God exists or not. Unless philosophy has moved way beyond my readings and I missed it.
There are also miracles with thousands of witnesses, most notably that at Fatima. The witnesses included not just Catholics, but also Protestants, atheists and those of other religions. https://www.basicincome.com/bp/files/Meet_the_Witnesses.pdf
[0] See Edward Feser's Five Proofs