Have you ever heard of Robert Spencer? Robert Spencer has written many books and lectures on what Islam historically and today Muslims believe about Islam.
His Lectures and books do not refute Islam, they expose the reality of Islam’s mixture of secular politics mixing with religion.
Another source I have looked into, are the ex- Muslims who have left Islam and live today under the threat of death daily, because ex=Muslims refuse to live under Sharia law, or have converted to another faith.
In these such sources you will learn the truth of Islam behind the veiled curtain that many leaders both religious and political fear to speak out and expose the truth about Islam.
When ever any religion mixes it’s religious faith with secular powers supposing itself to be following a deity, history proves always leads to many deaths, conflicts, hatred, anger and division of peoples, and speaks with a forked tongue. The bible gives such entities a name; "Anti-Christ.
Islam and Protestantism are the only two religious faith’s, In my opinion, that uses their religious platform to condemn another faith in order to convince non-believers, that Islam or a protestant sect is true. Islam makes the self claim to be speaking truth, again by condemning or knocking down another’s faith’s belief’s or practices, in order to sway an argument that Islam is truth, while the other faith’s have abandoned truth or never had it.
Google or you tube, Robert Spencer and Woman who have left Islam, ex- Muslims speak out against Islam for direct sources.
Peace be with you