JERUSALEM (AP) — Majd Ramlawi was serving coffee in Jerusalem's Old City when a chilling text message appeared on his phone.

"You have been spotted as having participated in acts of violence in the Al-Aqsa Mosque," it read in Arabic. "We will hold you accountable."

Ramlawi, then 19, was among hundreds of people who civil rights attorneys estimate got the text last year, at the height of one of the most turbulent recent periods in the Holy Land. Many, including Ramlawi, say they only lived or worked in the neighborhood, and had nothing to do with the unrest. What he didn't know was that the fea...