I do think that where there are incompatible truth claims, one claim is true and the other false. Or both are partly right, partly false - I don’t believe contradictory truth claims can both be true.
For example, Christianity believes if/when you reach heaven, you are there eternally. Buddhism claims it is temporary. It seems to me one’s stay in heaven is either eternal or temporary (or heaven doesn’t exist at all). But I don’t see how both the Christian claim AND the Buddhist claim can be true–that when we reach heaven we will be there eternally and we will be there temporarily.
As a matter of epistemology, I don’t know which is true. As a matter of practice, I proceed from the choice that the Buddhist description is true. If a Christian said that heaven was eternal, or an atheist said that heaven didn’t exist, I wouldn’t say they were wrong, because I don’t know. But I would say that isn’t the view I base my practice on.
I assume that many religious practices have a path to a good destination. I don’t know for sure what that destination is. (Though again, as a Buddhist I operate from the premise that the Buddhist description is correct. At least until I am confronted with evidence it isn’t. Like dying and Jesus saying, “Welcome to eternal life in heaven!”) I assume some (maybe me) will be surprised when the path they are on leads to something good, but not the destination expected.
I see Buddhism as the most skillful path for me. (And I see it as a skillful path in general, which I am happy to share if someone specifically asks me.)
I believe - within the religions I am aware of - there are skillful paths. I’m certainly not going to try to tell a Christian living a life of love and charity and good works through their faith in Christ they are on the wrong path. We’d probably sit down and have a conversation - like the one you started with this thread - on where our paths are similar and different. I’ve read the Bible a number of times, and a number of works by Christian writers - that have certainly deepened my understanding of the spiritual life.
Now, I also think there are bad paths out there, within all religions. I believe paths that condone hatred and even violence against other groups are confused and dangerous. So while I am comfortable saying all religions offer a skillful path, I wouldn’t say that all paths offered by religions are skillful.
Within Christianity, I love the writings of Evagrius Ponticus, John Cassian, and the Desert Fathers and Mothers. I think they point to a path I find truly beautiful. I’m less enamored with the writings of John Calvin. I think those writings point to a path I would call confused and misleading. Obviously just my two cents.
Within Buddhism, you’ll find arguments about whether, say, secular Buddhism is a skillful or confused path.
So finding a skillful path goes beyond finding a religion that works for you - it also requires making choices among a variety of traditions and approaches within that religion.