The answer isn't simple, but it's also probably not what you expect
The outburst of Petro is linked to the Soviet Propaganda of Freedom Fighting and is quite anachronic. IRA and ETA stopped. Guerrillas in Colombia became drugdealing armies, the Palestinian PLO governs corruptly the Areas given by Oslo Accords in luxury while people have to come to work to Israel. Hamas leadership lives nicely in Qatar , while Gazans depended on the enemy on work, health and basic services as water and energy. I understand the political coherency against the inequity, but Hamas actions are not the official and internationally voice of the Palestinian Claim. Every Palestinian that is Arab Israel tries to distance themselves from Hamas, even Abbas to avoid the international tag as terrorist.