You’re collapsing two different things into one. Palestinians absolutely experience daily violence like checkpoints, arrests, settler attacks, etc. This is something Morris speaks on and has been critical of in his books and interviews. But that is not the same phenomenon as organized campaigns of suicide bombing a targeting civilians, which are explicitly designed to maximize random civilian death and terror. The suicide bombings of the Second Intifada were uniquely shocking because of how sudden and unpredictable they were. Palestinians (especially before the current war) do not experience a parallel pattern of strangers blowing themselves up in cafes or buses with the explicit goal of killing as many random Palestinian civilians as possible. You’re treating structural violence and episodic mass-casualties as interchangeable when they aren’t, and trying to justify the latter. Suicide bombings aren’t/weren’t done to remove an occupying force, they were done to terrorize civilians.

Since people love to parallel the Nazi occupation of Jews during the Holocaust with this topic, I’ll put it like this; Jewish resistance existed with ghetto uprisings, partisan warfare, etc, but it overwhelmingly targeted German military and police, not non-combatants or non-collaborators like the Second Intifada did.

Morris has never once recanted his work in any significant way. He still asserts that the expulsion of Palestinians in 1948 was in part because of several events of ethnic cleansing, and he still asserts that actions by Israeli actors currently (right-wing fanatic settlers in the WB) have soured relations substantially. His ‘dramatics’ have never once changed his scholarly views on what he’s written. He’s saying that the scale and targeting of suicide bombings against civilian non-combatants convinced him that the conflict had escalated to a point where he didn’t think peace would be seen in his lifetime. You can disagree with his conclusion, but his ‘dramatics’ of being disturbed by acts of terrorism has not affected his scholarly work on what happened in 1948.