Comment: People can make up anything they like

about Jesus if the assumption is that He was misquoted. The problem with that premise is that the Bible in its original autographs is the Word of God exactly as God inspired it through various writers:

"All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness," 2 Timothy 3:16

Was Peter also misquoted in Acts 4:12?

As far as only a few understanding Him, this was explained by Jesus in several passages, such as Mark 4:10-20 and Matthew 13:10-17.