It’s a good question. Historically speaking, the arguments for one or another aren’t terribly convincing, it’s individuals who need to be convinced and they use their own reasoning to make their choices. Religions reflect societies and joining a society often means joining the religion. These days that’s less of an issue but back when these religions were emerging it was way way more of one.
In the New Testament, being welcoming to non-Jews wanting to participate in the Kingdom of Heaven was an ongoing concern. Decades later, this led to the splitting off of Christendom from Judaism. They’re just too hard to reconcile. Christian Jews could follow the laws having been brought up that way, but Jesus-following non-Jews found them messy, inconsistent, and just downright weird.
Religion, by and large, should not be considered to be ‘correct’ or not. There is only one God, how you worship Him is not all that consequential.
That said, there’s an important sense in which one can come to the conclusion that the Christian way of looking at God is better than the others, and furthermore, to isolate a version of Christianity that’s better-reflective of the actual reality of the spiritual world than the others. I’ll deal with the former before tackling the latter.
The aspect of spirituality that Jesus brought to the world that appears to be missing, that also can be found in the Buddha’s offering, is that of prioritizing essence and spirit over more conservative, materially-derived theology. Jesus taught that intent matters. You don’t just follow rules for following sake. What God meant when he gave you those rules is far more important. This questioning of intent is very subversive and disrespectful of existing social power structures. To ask why is to claim that you know better, and that sort of question can get you killed, as it did Jesus.
Social structures of the Iron Age created totem poles of dizzying height. These social structures ossified and made normal things that would have never been considered good or true before. Humans are really good at making rules and making each other follow them. Jesus exhorted you to follow God, not the law, that God is the sovereign, not a king. This emphasis is why many many people think Christianity is superior to other monotheistic religions. Jesus held no political office, controlled no wealth. Jews aspired to a kingdom of their own, Islam was started by a man with ambitions to kingship.
Now that you’ve heard my argument for Christianity, allow me to tell you why I subscribe to the Swedenborgian vision of it.
You’ve all heard of the big names in Christianity. Saint Augustine, Martin Luther, the various Popes. They all had their role in carrying on the word after Jesus left. And you can trace a history of politics and theology whereby the church (here used in the sense of ‘the body of Christ,’ all of those who believe in Him) grappled with issue after issue regarding how to organize a society that can be as faithful to the Lord as possible.
There was the original schism which separated Christians from Jews that I already touched on. There was the split centuries down the line which set in stone the belief that Jesus was actually God and not just a man. There was the more political shift, not that the Arian controversy wasn’t political, this one was just even more based in land and power than that one, that separated the Eastern and Western churches. In the west we then later had the Reformation which concerned justification, what determines who deserves the Lord’s riches.
And if you look at all that like I did, you see a theology that’s trying to justify itself for it’s own reasons. Kind of the opposite of what Jesus taught. Emanuel Swedenborg was a mystic who started having dreams, and then later visions, of the spiritual world. He was able to reconcile the conflicting notions of justification being thrown about in the Protestant world with a focus on a person’s love.
Once recontextualised in this way, everything falls into place, and one can even find harmony and alignment with the world’s other religions. There is no need to know a vast existing body of theology to get right with spirit. Simply take stock of who you are by analyzing that which you love and you’ll find out what you’ll be doing in the afterlife.
And so Swedenborgianism isn’t a denomination, it exists outside of the political environments of faith. One can easily politicize Protestant justification by faith, those who believe in this, follow me. The argument from history that the Catholic Church uses is almost literally a political one, though perhaps one of necessity.
And it’s version of spiritual reality squares really evenly with the 15 years of focused spiritual explorations that I personally have done, that I’ve written over 3200 answers on Quora about, and even more on other social media sites.
That’s my answer, but the beauty of faith is that you can pick your own.