Richard Engel's story and the implications about Syrian rebel stories

What is amazing about the mild reaction to the Richard Engel's story--that the moderate, feminist, secular, angelic, romantic, and adorable Syrian rebels--went to the extra length of staging a kidnapping and resorting to torture of victims in order to implicate the Syrian regime, and yet: no one in the mainstream Western media or even in the Western human rights organizations bothered to draw conclusions about the credibility of reports and statements by those same rebels.