A good case against God

[Jeffonthenet]

Mark is not the only source, and since you disagree with scholarship you ought to give serious evidence to back up your claim.

I have the evidence, which also deconverted me.

The letters of Paul, the other synoptics, John,

The other two synoptics are based on Mark and therefore not witness accounts. John is also not a witness account (written in 3rd person like Matthew). These 3 Gospels took Mark the wrong way and it's evident. Matthew for example has bits where the author clearly misunderstood what Mark was conveying.

It isn't about Mark, Luke etc… it is about their source material. Scholars have determined that there are multiple sources behind the gospels themselves such as "Q". There is the information, if I remember correctly that is in matthew and Luke but not in mark, the information in mark and matthew and not in luke, etc… There are differences perhaps in certain accounts but that is something that is a part of historical studies as the historian must discern what is historical and what is not.

Paul on the other hand seems to be preaching about a spiritual Christ. He doesn't mention anything about the life of Jesus, parables or miracles. It's actually not a surprise because the early Christians were divided into 6 categories about what they believed. These beliefs ranged from a fully spiritual Christ to a fully human and divine Christ.

To say that Paul did not believe that Jesus actually lived and died on a Roman cross is absurd. (if this is what you are saying) I challenge you to find one historian in the world with a teaching job and Phd who will agree with you.

and other sources such as Josephus, Tacitus, Suetonious,

It has been shown time and time again that for whatever reason these references aren't true.

and even the gnostic gospel of Thomas

Thomas is a Gospel of pure sayings which makes it even less useful than the canonical Gospels.

Actually, scholars deduce that the earliest sources were probably saying sources.

are used as sources by historical Jesus scholars.

Indeed they are used, but to no effect.

All of the relevant scholarship is against you.