When Hamas formed in 1987, they had minimal support from Palestinians. But in 2021, support for Hamas dramatically increased as AP News reported:
apnews.com/article/hamas-middle-east-science-32095d8e1323fc1cad819c34da08fd87
In 2022, respected Palestinian pollster Khalil Shikaki and his Palestinian Center for Policy and Survey Research (PCPSR) carried out a survey looking at Palestinian support for armed groups. Main takeaways below:
• 72% of Palestinians support forming more armed groups in West Bank
• in Gaza, 84% of respondents supported concept of armed groups taking NO orders from the Palestinian Authority. This is HIGHER than in the West Bank where 65% supported the idea.
www.pcpsr.org/en/node/924
And:
"....there is widespread popular appeal for competing armed Palestinian factions, including those involved in the attack. Overall, 57% of Gazans express at least a somewhat positive opinion of Hamas—along with similar percentages of Palestinians in the West Bank (52%) and East Jerusalem (64%)—though this is fewer than those who support Fatah (64%).
But it is organizations like Palestinian Islamic Jihad (PIJ) and Lion’s Den that receive the most widespread popular support in Gaza. About three quarters of Gazans express support for both groups, including 40% who see the Lion’s Den in a “very positive” light, an attitude shared by a similar percentage of West Bank residents."
www.washingtoninstitute.org/policy-analysis/polls-show-majority-gazans-were-against-breaking-ceasefire-hamas-and-hezbollah#:~:text=Overall%2C%2057%25%20of%20Gazans%20express,who%20support%20Fatah%20(64%25).
So, the support for Hamas, Lion's Den and other Palestinian armed groups is there from the Palestinian population. A minority do not support them.
Important to note that Abbas' Fatah party also has an armed wing - Al-Aqsa Martyrs Brigade. So, there is a LOT of Palestinian support for terrorist groups overall.
So, not all Palestinians support Hamas. But it is NOT wrong to say that a majority of Palestinians support terrorist groups.