It finally dawned on me that I had heard about him elsewhere... here:

To demonstrate how wide the findings are going into the depth Palestinian society we mention here that almost the entire high‐level politicians of the PLO, as well and the majority of Hamas leaders, are of a Jewish origin. This includes Mahmud Abbas (Abu Mazen — a descendant of a family of Rabbis), the late Dr. Saʻeb Erikat, Jibril Rajub (Argov), Maruwan Barguti, Nabil Shaʻat, Khanan Ashrawi, from the Fatah movement, […] Khanin Zuabi, and late sheikh Akhmad Yassin, Ismail Haniʻya, Dr. Mussa Abu Marzuk, Muhammed Def, Dr. Aziz Duwek (a Cohen), and above all Yikhyeh Sinuar from Hamas.

How could I have forgotten?

Only recently did I learn that the Palestinians have a word for their Maccabean spirit: sumud. Learning about how Sinwar perished in combat, I was reminded of something as I was doing research for this thread:

A transport of prisoners from Bergen‐Belsen Concentration Camp arrived at Gas Chamber II of Auschwitz. In the undressing room, one of the Jewish women seized SS man Josef Schillinger’s pistol and shot Schillinger and another guard, Wilhelm Emmerich!

You can see that sumud runs in the family.

Unfortunately, not all Jews choose to harness their gifts; some try to imitate their conquerors instead.