Okay. An analogy. If someone kills my neighbor, and I use his death as a justification to attack a cop. I didn't "help" my neighbor. I used his death to justify my own violence. Rightly or wrongly.
Discussion
I get the analogy. Thing is, it's not what happened, and he never mentioned the Palestinians. He was the CIA's guy in Afghanistan during the Russian invasion. When that was done, the CIA abandoned him. Then he gets disowned by the Bin Laden family. The guy had a bone to pick with a lot of people.
He absolutely did mention the Palestinians among other US led incidents in the middle-east. I have read a lot about him and his motivations. Maybe you just missed that one.
I did miss that one. But I don't believe Bin Laden had much to do with 9-11. I think he released a video claiming credit to get support in the Arab world after the Bushes has abandoned him.