1). I learned how not to share the Gospel with Muslims (or anyone else for that matter).
2). I learned that there’s a time, place, and context in which to discuss the sordid, wicked, and scandalous origins and history of Islam (and Catholicism, and Mormonism, and Jehovah’s Witnesses, etc.) and that this wasn’t that proper time, place, or context.
3). I learned that it’s acceptable to insult, revile, mock, and distort the truth of Christianity and our Lord Jesus Christ, but bringing up the skeletons in the closet of those who started false religions will get you punched.
4). I learned how quickly people resort to violence and the “N”-word when angered.
5). I learned just how peaceful “Islam” truly is in practice.