The real tricky part is the Ebionite Gospel(s), which didn't survive. Because they were Jewish Christians, claiming to carry on the beliefs and practices that J

The real tricky part is the Ebionite Gospel(s), which didn't survive. Because they were Jewish Christians, claiming to carry on the beliefs and practices that James and Peter did after Jesus. Which would have been more like the Essene Judaism than Pauline Christianity. So it depends on whether one thinks Paul got his gospel from Peter & James, or by revelation.