I prefer to point out the incongruities and inconsistencies in various religious claims and note that they cannot ALL be correct, and that therefore I choose not to accept ANY of them.....it is a mere side issue that I 'suspect' that none of them are correct about most claims.

It 'is' possible that some claim of some particular church **might** be correct, and I am aware that peer pressure, wishful thinking and history make it very hard for some to even consider doubting, so I tend to stick to pointing out bad logic and egregious behavior.

It is very hard to explain how a belief is 'demonstrably false' when that is usually reserved for syllogisms and laws of math & physics.