I got involved in this as a student the 90s but much is on the internet now, For the heavy stuff you need to filter out the incredulous religious attempts at discreditation and head to the university history databases.
A search for “Tiberius Julius Abdes Pantera of Sidon” is a great start, you can still see his grave in Germany. The Tanack, Jewish bible also alludes to Pantera as the father of Jesus.
The Fourth Philosophy and Judas the Gillian (Also known as Judas of the Sicari) is well documented now. This is the same Judas in my post
Most of the surviving roman archives, tax records and military documents are catalogued now.
There are also some books that are of interest
Pantera by Sara Reinke
James, the brother of Christ by Robert Eisenman
The Mythmaker by Hyam Maccobys
Judas the Galilean: the flesh and blood Jesus by Danial Underbank
I've also seen extracts from a book now published I believe by Paul Cresswell entitled Jesus the Terrorist
I am aware of Simon Zelotes being a member of Jesus' disciples and that the Zelotes were another name for the Sicarii (or a subgroup of the Zelots). The Zelotes were the "forth sect" of Judaism at that time.
I will research what you have given me.
Thanks. It is an interesting diversion at the very least.