Ramallah in particular is a very westernized, modernized city. To illustrate, the city has KFC branches (which no city in Israel has), and coffee downtown can run you $6 (compared to $1 in cities like Nablus).
KFC is hugely popular in the Arab world in general but fried chicken never really became popular in Israel with or without buttermilk.
Starbucks also failed in Israel since apparently the locals being used to actual coffee didn't not accept what they sold as coffee while "high-end" Israeli coffee chains like Aroma Coffee became hugely successful in Israel and expanded abroad.