I dunno, was he? If you think that God only communicates to the human race, and all life, through a book written by men 2000+ years ago, then I guess you're stuck with that. That is why it is so difficlt trying to discuss this with religious people. they ONLY recognize God through their religion's filter. It's very limiting.
Supernatural? That sounds like mythology. I don't think Jesus was "supernatural" at all. I think Jesus was very, very Natural! And, so are we. "Jesus answered them, “Is it not written in your Law, ‘I said, you are gods’?" and "Very truly I tell you, whoever believes in me will do the works I have been doing, and they will do even greater things than these..." I guess the difference is, I don't interpret that to mean "Me" in the literal sense. I interpret that to mean believes in yourself and God and your limitless abilities if you just be true to your soul and BELIEVE it.
I think we are all part of that Trinity. But, to the specifics of the religious doctrine you follow, as being supreme over the rest of the religious doctrines (which are all similar, but originate from different locations)? No, I don't believe that ONLY Christians are given eternal life. I believe that every, single, one of us is eternal. We always have been and always will be... life without end. We are all Jesus if we want to be. I believe Jesus was the Son of God just like I believe YOU were, and are! Just like I am.
I'm not a follower of religion. I don't limit my understanding of God through ONE religion. I follow my Soul and how God speaks to me through my soul. I feel compelled to use Scripture(s) when God tells me to, r when my Soul feels I need to. Just like everyone else! I don't acknowledge God through a religious filter only, however. Or, I try not to as much as possible. Religion offends me, sometimes. It has tricked people, with good intentions maybe, into believing that we need the religion to "get to God." The truth is, we have never been apart from God. I don't think many people realize how much they worship their religion when they think they are worshiping God. First of all, God does not "need to be worshiped." God just IS! The need to be worshiped sounds like something people require and crave... not God.