You can look at any course at any college on origins of Christianity. At Ohio State University, where I went, they aren't even part of the theology school. They are in the history department. Historical Jesus is one, and origins of Christianity is another. The Jewish annotated new testament had around 50 Jewish scholars that worked on it. None of them are mythicists. You can check askhistorians here on reddit. You'll find historians of all types accepting a Jesus figure most likely existed.
Do we have surveys that most astronomers don't think the earth is flat? Probably not. Does that stop anyone from asserting it? No. Because it's in every single textbook and taught that way everywhere. If you're going to need a survey to back that up, then you'll find you'll hardly ever be able to reference a consensus. Because no one bothers taking a poll on things that are basically obvious.
https://history.osu.edu/courses/3219 https://history.osu.edu/courses-mobile
Note how the theology courses at OSU are in a different department.
Jewish scholar of the period
https://en.wikipedia.org/wiki/G%C3%A9za_Vermes
And another
https://muse.jhu.edu/article/784286 https://en.wikipedia.org/wiki/Paula_Fredriksen
And another
https://en.wikipedia.org/wiki/Amy-Jill_Levine
Pamela eisenbaum is another
See here her review of a historical Jesus book.
More discussion of Jewish scholarship on Jesus
https://www.kesherjournal.com/article/a-half-century-of-jewish-scholarship-on-jesus/
More discussion
https://www.tandfonline.com/doi/full/10.1080/0449010X.2013.855451
It's also hard to explain why so many atheist scholars and historians of early Christianity accept a historical Jesus. Carrier claims it is Christian bias, but why does that Christian bias not prevent them from denying Jesus' divinity? After all, Christianity is equally false with a Jesus that didn't come back from the dead as it is with a Jesus that didn't exist. As far as the truth of the Christian religion is concerned, a non existent Jesus is the same as a non magical Jesus.