Islam is very easy, we have

a. The Quran - The word of God
b. The Hadiths - The words, deeds of the prophet, and what the prophet told us to do.

But the problem occurs when people interpret words from the Quran or the hadith without taking the actual context in which it was ordained. Intelligence is not an issue here.

and you are right that people try to manipulate not only muslims, christians jews or any other religion by their interpretations of the truth. Just for their own agendas

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