Palestinian political leader and activist George Habash died yesterday. The interesting part is that Habash was part of the 60s-70s Palestinian resistance movements that employed terror tactics trying to draw attention to the Palestinian cause.
Habash was Christian, specifically Greek Orthodox, but his influence is mainly Leninism/Marxism, and Arab nationalism in the form of Nasserism, and founding the PFLP.
Another movement influenced by these ideologies is the PLO.
An observation that can be made is how the resistance movements morphed from nationalist/leftist by secular founders in the 60s-70s to religious/Islamic afterwards in the 80s-90s in the form of Jihad and Hamas.
The cause and tactics remain the same, but the ideology shift to suit what is in vogue at the time.