1. You are amongst very few Muslims who actually say his book are worthless in content. The vast majority of Muslim either praise or are suspicious that its not a one-man work. There is educated westerners who are fundamental atheists who laugh at his books. Thats fine people laughed at even prophets all the time so who is Harun Yahya. 2. The second point is misleading. Good Akhlaq is important but most dawah is done over the internet, books, videos, youtube, public forums and speeches. Showing good akhlaq is not enough to convert ideological people. People will think you are a good man but may still think you are intellectually unsound. Even many non-muslims have good akhlaq so what does that suppose to mean? Mandela, Ghandi and many others. If I meet western people I see most of them as polite and non-trouble makers. Does that mean I should join their religion? What logic is that? Akhlaq is good to prove that your religion also produces goodness but mainly its the ideologies, beliefs and intellectual basis which make up a religion. Reason is one of the main way which leads man to religion. Akhlaq is an adjunct not the primary basis to lead you to truth. If I see a person with good akhlaq I dont have a choice to follow his religion, I can change my akhlaq to follow him. But if want to change my beliefs and religion I have to be ideologically convinced and my reason should be liberated and aligned with the truth.