So two very different things here. Jefferson's view and Marcion's view don't coincide. Marcion, in the 2nd Century, believed that the God of the OT was a different God from what Jesus and Paul taught. Marcion was basically a polytheist. One who took Jesus and Paul out of their Jewish context. However, we have no idea what was in Marcion's Gospel as we don't have it.
With Jefferson, he had no problem with the Jews. The portions of the Gospel he kept are Jewish thoughts. Rabbi Nuesner states that what's left are Torah teachings. And he wasn't really gnostic at all.
More so, there is no evidence for your claim. Again, Jefferson recorded his reasons. None of them had to do with not liking the influence the Jews had on the Gospels.
Evidence or not, I can only go on what's available in print.
"He proposes beginning with a review of the morals of the ancient philosophers, moving on to the "
deism and ethics of the Jews", and concluding with the "principles of a pure deism" taught by Jesus, "omitting the question of his deity". Jefferson explains that he does not have the time, and urges the task on Priestley as the person best equipped to accomplish it." - WIKI
Wiki goes on to say that Jefferson took a scalpel to the Canon gospels, which is the same thing Marcion did with Luke.
Persoanlly, I really don't care as deism was a popular 17th 18th century belief system. It just appears ironic, that Jefferson, in some ways, was more concerned with the added content of the orthodox, though he clearly didn't care for Paul. Attorneys need to focus on physical law, and leave the spiritual alone, IMO.