There are clear guidelines written down in the textbook for ethical speechmaking such as being trustworthy, being respectful towards others, having dignified conduct, being honest in the message being passed across, and being an authority on the subject but not explaining your credibility on the speech topic.
When making a speech, it would be illogical and counter-productive to start to explain one's credibility on the speech topic, rather show you're an authority when you start your speech.
The pull factors that attracted European Jews to Eastern Europe during the late Middle Ages were that Jews were attracted to Eastern Europe because they could practice Judaism there without any persecution.