Disrespectful? Are you kidding? Have you even been to Negril? Whatever an individual finds most convenient is the way to go. Your hotel is priced in U.S. dollars. Transportation from the airport is mostly quoted in U.S. Almost everything is priced in Jamaican and in U.S. Almost all the higher end restaurant menus are in U.S. And most smaller restaurant bills are presented in one currency and will have the conversion rate on the bill.
What is disrespectful however, is your comment about using Jamaican money in Tennessee.