The reason for the decline I feel is also due to the fact that Muslims no longer follow the Quran. They have diluted their faith with other things and following the words of God to lead them out of darkness into light has been buried under piles of rubbish.

Muslims no longer follow the banner of God Alone. Look at Muslim countries..they used to be great, progressive..now, stuck in a time warp and backward. What happened? God Alone is no longer the focus of their attention.

Nothing will be right until the focus is back on God Alone and His Book of guidance..The Quran.