Your questions need no answers since they are all self evident wrongs perpetrated by the ‘ummi’ Muslims! The answer is also in the post started by Mubashir called Ethnicity trumps Religion/Deen?, just below.
Self interest, not rising above ones animal instincts, greed, ignorance, fear etc. amongst the Muslim ‘Ummah’ [!!!!] all contribute to the present situation.
One thing I would like to comment on from your post:-“as my Only Lord has a reason for all”. Allah has left us with a free will which we exercise to our gain or loss. The reasons for our decline are known by Allah and should be known by us, but we choose to ignore them; that is why you are asking questions that should shame the Mullahs, but will never do so!