Not if he turned water to wine or took a loaf of bread and fish to feed all the people who came to hear him preach.
Maybe, but even in the Bible, Jesus wasn't the only one doing miracles- various competing false messiahs, like Simon Magus, for example, also did supernatural things, so others might just see them as cheap tricks. Plus he didn't use any miracles to save himself when the cops came, and let's face it, looking like a broke Arab saying wild shyt in the street would probably get him arrested with the quickness.