In their eyes every Israeli is complicit in their suffering.
I used a that example because I figured it'd be easier to understand.
They've been under direct siege from Israel for decades. When you've been oppressed that long anyone who belongs to the side of the oppressor becomes the enemy.
Think of it like Nazi Germany. How many innocent German civilians were killed because we couldn't discriminate between Nazi and not Nazi?
Israel has been trying to provoke Palestine into violent actions just like this as an excuse to further push their genocide of Palestine.