That a Jewish teacher named Yeshua was active in Galilee and Judea around the year 30, and was crucified under Pontius Pilate, is affirmed by virtually all historians, religious or not. The reconstruction of anything more is where the source problem begins.
The earliest witness is Paul, whose genuine letters were written in the 50s, within a generation of the crucifixion, yet Paul says almost nothing of the ministry and records no parables. The narrative Gospels, Mark first, around 70, then Matthew and Luke drawing on it, and John later still, were composed decades after the events, in Greek, by authors writing outside Galilee for communities that already believed. They are confessional documents, not disinterested reports, and where they diverge the historian cannot simply average them.
Outside the Christian sources the notices are brief. The Jewish historian Josephus mentions Jesus twice; the longer passage, the Testimonium Flavianum, is widely held to preserve an authentic core that a Christian copyist later embellished, the words he was the Christ being nearly universally judged a later insertion. The Roman Tacitus, writing about 116, records that Christus had been executed under Pilate.
From this most scholars reconstruct a Jewish apocalyptic prophet and healer, baptised by John the Baptist, who proclaimed God's coming reign and was executed for it. Beyond that outline, it is method rather than faith that sets the limits of what can responsibly be claimed.