What is the evangelical protestant faith and what is a heretic?

Dr Matthew Jacoby and our host DJ Paine wade into the waters of religious differences and the history of the Christian faith to discuss what Jude writes about:

"Beloved, while I was very diligent to write to you concerning our common salvation, I found it necessary to write to you exhorting you to contend earnestly for the faith which was once for all delivered to the saints."