Bin Laden has never said that he is attacking us because he wants us to convert to Islam, he has made it crystal clear that it is the polices of supporting Israel and other oppressive regimes, the killings and theft that he wants us to end.
If you read what he said in the latest video, it is clear that he is talking about policies. His reference to Islam was saying that we could use it as leverage to achieve what we want. He INVITED us to Islam (not demanded), saying if those in power saw that we (the American people) were going to search for an alternative to the capitalist system, those in power would meet our demands to end the unjust polices.
Look what bin Laden actually says (by the way, Bush says we should listen to what the enemy says):
"People of America: the world is following your news in regards to your invasion of Iraq, for people have recently come to know that, after several years of the tragedies of this war, the vast majority of you want it stopped. Thus, you elected the Democratic Party for this purpose, but the Democrats haven't made a move worth mentioning. On the contrary, they continue to agree to the spending of tens of billions to continue the killing and war there, which has led to the vast majority of you being afflicted with disappointment. I will come back to reply to this question after raising another question, which is: Why are the leaders of the White House keen to start wars and wage them around the world, and make use of every possible opportunity through which they can reach this purpose, occasionally even creating justifications based on deception and blatant lies, as you saw Iraq?"
Bin Laden then explains that it is "the owners of the major corporations who were benefiting" from these wars. Bin Laden talks about the Iraq war being unnecessary:
"This war was entirely unnecessary, as testified to by your own reports. And among the most capable of those from your own side who speak to you on this topic and on the manufacturing of public opinion is Noam Chomsky, who spoke sober words of advice prior to the war, but the leader of Texas doesn't like those who give advice. The entire world came out in unprecedented demonstrations to warn against waging the war and describe its true nature in eloquent terms like "no to spilling red blood for black oil," yet he paid them no heed. It is time for humankind to know that talk of the rights of man and freedom are lies produced by the White House and its allies in Europe to deceive humans, take control of their destinies and subjugate them. "
Bin Laden states what millions of Americans already know:
"So in answer to the question about the causes of the Democrats' failure to stop the war, I say: they are the same reasons which led to the failure of former president Kennedy to stop the Vietnam war. Those with real power and influence are those with the most capital. And since the democratic system permits major corporations to back candidates, be they presidential or congressional, there shouldn't be any cause for astonishment - and there isn't any- in the Democrats' failure to stop the war. And you're the ones who have the saying which goes, "Money talks." And I tell you: after the failure of your representatives in the Democratic Party to implement your desire to stop the war, you can still carry anti-war placards and spread out in the streets of major cities, then go back to your homes, but that will be of no use and will lead to the prolonging of the war."
Bin Laden points out that our political system is not protecting the interests of the American people:
" It has now become clear to you and the entire world the impotence of the democratic system and how it plays with the interests of the peoples and their blood by sacrificing soldiers and populations to achieve the interests of the major corporations. ... the world is being dominated by the democratic system, which confirms its massive failure to protect humans and their interests from the greed and avarice of the major corporations and their representatives."
"And despite this brazen attack on the people, the leaders of the West - especially Bush, Blair, Sarkozy and Brown- still talk about freedom and human rights with a flagrant disregard for the intellects of human beings. So is there a form of terrorism stronger, clearer and more dangerous than this? This is why I tell you: as you liberated yourselves before from the slavery of monks, kings, and feudalism, you should liberate yourselves from the deception, shackles and attrition of the capitalist system."
"If you were to ponder it well, you would find that in the end, it is a system harsher and fiercer than your systems in the Middle Ages. The capitalist system seeks to turn the entire world into a fiefdom of the major corporations under the label of "globalization" in order to protect democracy."
"And Iraq and Afghanistan and their tragedies; and the reeling of many of you under the burden of interest-related debts, insane taxes and real estate mortgages; global warming and its woes; and the abject poverty and tragic hunger in Africa: all of this is but one side of the grim face of this global system."
"So it is imperative that you free yourselves from all of that and search for an alternative, upright methodology in which it is not the business of any class of humanity to lay down its own laws to its own advantage at the expense of the other classes as is the case with you, since the essence of man-made positive laws is that they serve the interests of those with the capital and thus make the rich richer and the poor poorer."
"And if you would like to get to know some of the reasons for your losing of your war against us, then read the book of Michael Scheuer in this regard."
""To conclude, I invite you to embrace Islam ... The true religion also puts peoples' lives in order with its laws; protects their needs and interests; refines their morals; protects them from evils; and guarantees for them entrance into Paradise in the hereafter through their obedience to Allah and sincere worship of Him Alone.
And it will also achieve your desire to stop the war as a consequence, because as soon as the warmongering owners of the major corporations realize that you have lost confidence in your democratic system and begun to search for an alternative, and that this alternative is Islam, they will run after you to please you and achieve what you want to steer you away from Islam. So your true compliance with Islam will deprive them of the opportunity to defraud the peoples and take their money under numerous pretexts, like arms deals and so on. "