I think Lemmy has a problem with history in general, since most people on here have degrees/training in STEM. I see a lot of inaccurate “pop history” shared on here, and a lack of understanding of historiography/how historians analyze primary sources.
The rejection of Jesus’s historicity seems to be accepting C S Lewis’s argument - that if he existed, he was a “lunatic, liar, or lord,” instead of realizing that there was nothing unusual about a messianic Jewish troublemaker in Judea during the early Roman Empire.
The Pilate Stone is where his 1961 date comes from. The Josephus bit that mentions Pilate is the “Testimonium Flavianum” which is the reference to Jesus in Josephus that was likely edited by a later source. It does look like the numismatic evidence (coins) are ridiculously common though.
Often, coins are the only evidence of historical figures. Lots of petty kings that never have anything written about them, but do have coins.