That Jesus is the Gate and all the others are up to no good. This implies that anyone who is not Jesus or pointing exclusively to Jesus is trying to lead people astray, rob them of their worth, and ultimately lead them to death and destruction. That seems... severe. So Jesus, we'd like to know, “Why so serious?!”
A Jewish guy, the son of a woman who was allegedly a virgin, born into family of charismatic zealots, decided to base the entirety of his life on earth on a single reality: everything exists because of Him. Not many people have said things like that. Not many people have gone into as much detail or even died to prove it. And, history suggests, not very many people chose to die the way that he did either.
A way to describe Christianity may be Christology, or, the study of Jesus. Jesus, a person, lived in our world with a lineage, an immediate family, a community of friends, a following. Because he is an actual human being with feelings, emotions, concerns, and desires, he enjoys the aspects of a relationship, such as conversation, quality time, etc. And so the point of Christianity is really to say that God in Jesus can be known.