Failure condition for god

[robvalue]

Truth doesn't require falsifiability, but any meaningful claim does. Otherwise we can have no way of knowing anything about whether it is true or not and are simply guessing or making stuff up.

If the god claim cannot be falsified, it is useless and claiming to have belief or knowledge about something we can know absolutely nothing about is irrational.

Whether people care that it is irrational is another matter. The best you have is "it could be true, and I like it, so I'm going to say I believe it". By definition, any reasons you have for believing it are irrational as the claim is such that we can know nothing about it.

Whether you actually believe it, or just say you do, is yet another issue.

If you're just going to assert it is true, god exists, then that is ridiculous.