The information we have about what Jesus did comes from the Bible. The Bible has Jesus performing miracles and making statements that imply that he thinks he's God. He never acts as if he's just a humble carpenter's boy, he acts as if he has the right to forgive the sins of others, he says he's going to come and judge the world, he predicts his own resurrection, he goes into the temple and acts as if the place belongs to Him, he teaches the Torah without feeling that he has to refer to anything the rabbis had said about it in the past, and in some cases actually say "It says in the law of Moses X, but I say Y" suggesting that his own words supersede the Mosaic law. So the Jewish leaders asked the perfectly natural question "who in the Sam Hill do you think you are?"
None of this makes sense of course, if there is no God, and if Jesus has no special status or miraculous powers. C. S. Lewis argued that Jesus had to be liar, a lunatic, or else he had to be right and really was God. You can dodge Lewis's conclusion by arguing that the biblical sources are not accurate, and the Jesus never said or did anything that implied that he was anything more than a carpenter's son who became a charismatic Jewish preacher. But what that is going to do is leave you with no accurate sources with respect to what Jesus said and did. In which case, it's going to be hard to follow Jesus.