One of the things I love about Christianity (and why I believe it) is not just that it is philosophically possible, but that it is theologically possible. By philosophically, I mean that we can make sense of it; but we can do this about a lot of religions.
Though I am not a Muslim, I can understand and learn Islam. I can see how it addresses that the world we live in is not quite “right.” I can learn how Islam deals with human nature, what to do about our own imperfection, how to please god, etc.
This is what all religions do to varying degrees. Though I may not agree with the “philosophies” of a particular religion (how a religion deals with the problem of evil, how people are “saved,” how it deals with sin, etc.), I can accept that they in some way make sense. Though I don’t believe in karma, I can understand the philosophy behind it. While I disagree with the philosophies behind many religions, that does not make the philosophies themselves wrong.
But when it comes to the theology of a religion, that is the study of the nature of God (or gods, supernatural force, etc.), this is where I would argue all other religions fall short.