Your whole concept of Church, unfortunately, is that it is an amorphous "thing".  
You define the church as the hierarchy.  It is NOT.  The Church is the People of God.  That was taught at Vatican II---and it is a concept that is NOT GOING AWAY---not in your lifetime nor in mine.

PEOPLE can and do sin.  People from popes, cardinals, bishops, priests, religious and laity DO SIN.  The Church has committed sins against peoples on this earth, against cultures---and that is recorded in history.  You cannot deny it.  The Church has done much good/has done much evil, too.

Also, you seem to see God as oh, so quick to CONDEMN, to CAST INTO hell.  It is sadly, a view of a god that is man-made.  God forgave the Jewish people over and over again---because of love.  God loves all of us, who comprise the Church---and forgives us too.

You are confusing BELIEF [doctrines, teachings, reason] with FAITH [relationship with God based on a strong spiritual core---trusting, loving, yes even knowing God].