You can pray to God.Let God reveal the answer to you himself.
My answer is not authoritative.
I know that the Koran has no part in the Bible, God never spoke a word of it, unlike the Torah which is the foundation of Bible. I only wonder what god you're in communication with if it has told you that the Koran should be included.
However, I may pray God give me insight into the meaning that "Israel is blinded in part." For example, could it mean that, though Israel might reject the NT, they are only blind "in part" by merit of their regard toward Torah? Or might it only mean some see clearly while some can't see at all? Whatever the case might be in that regard, I'm certain that anyone that believes they can find God in the Koran can see nothing at all. But, especially if you are a man, I can see how hard it would be to resist the licentious free-for-all offered within it.