Sapae-ing established a leading Islamic school and became a folkloric figure for many Malay-Muslims in Thailand's culturally distinct far south despite being in self-exile since 2004.
The insurgency sees separatist rebels carry out near-daily attacks on security forces and perceived collaborators with the Thai state, which colonised the region over a century ago.
The majority of the dead are civilians in a conflict that has seen both insurgents and Thailand's military accused of rights abuses.
The school he founded is believed to have incubated many rank-and-file rebels.
"He was a philosopher who played an important role in education," said a statement by the Mara Patani, a group representing some rebel factions in peace talks with the Thai junta, confirming his death.
Mosques have been packed across the south for special prayers since his death was confirmed.
Thailand-based security analyst Don Pathan said his schools became "pillars of Malay identity" drawing the ire of Thai authorities as the insurgency gathered pace.
Thailand's military elite have long been accused by the kingdom's minority groups of enforcing a centralised concept of "Thainess" at the expense of diversity.
In the Malay-speaking south, for example, Thai language and script has been enforced for decades, fuelling anger and resentment.
Sapae-ing's legend grew across the unrest-hit southern states despite his relative silence in self-exile.
Zachary Abuza, a specialist on Southeast Asian militant groups, said he had a galvanising role in the rebellion -- although his operational links with rebel foot soldiers are unknown.
An end to the fighting remains distant despite peace contacts.
The armed insurgents, dominated by the publicity-averse Barisan Revolusi Nasional (BRN), want an amnesty for their operatives and serious discussion on devolution, leading to independence.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve hit your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Access to Exclusive Premium Stories Online
Over 30 behind the paywall stories daily, handpicked by our editors for subscribers


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app