There is "near universal consensus" among scholars that (at the least) Jesus existed historically, and was put to death in the Roman provence of Judea.
If a large number of people hadn’t followed him as Messiah, there would have been no need for the Jewish establishment to execute him. Nor would the story be remembered.
If He didn’t do miracles, the people would not have thought he was the Messiah, because the Messiah was expected to arrive with signs from God (i.e. miracles)
The plausible explanation is that Jesus did miracles; proving the existence of God.