Bin Laden clearly displays homophobia and antisemitism as main justifications for his terrorism in this letter. He clearly hated the freedoms allowed to individuals in liberal democracies and claimed they were the causes of their alleged degeneracy. It was rooted in ignorance and religious fundamentalism.
So I don't really know what other justifications you have found in this letter that would make you think Bin Laden had "reasons" to do what he did beyond this, he wasn't fighting for his people first, he was a religious fundamentalist, if that's not "supra political cosmological hate", what is it?
Also, if people were learning this from this viral campaign it would be good... unfortunately it seems that they are more focused on the antisemitism part in it as it relates to the current Israelo-palestinian conflict. That is why it became viral right now, context matters, and it's really not looking like a "learning" opportunity if you check the comment sections where this is shared.