Most antiquities scholars think that the New Testament gospels are "mythologized history." In other words, based on the evidence available they think that around the start of the first century a controversial Jewish rabbi named Yeshua ben Yosef gathered a following and his life and teachings provide...
as long as we don’t have a time machine, Jesus’ existence is an unfalsifiable claim. Of course you’re not going to see definitive proof that he didn’t exist