Agreed,I don't think that isolated mental illness within the muslim community is what gives rise to Isis. It does seem to me that entire communities do become mentally ill, however. What else is it when the Quran allows for forgiveness of an adultery, there is no mercy. Only consistent killing. When there can be forgiveness there are beheadings. These are community mental health problems.
The OT Jews had it no different than the most blighted of these Islamic societies.
I wonder, though, if change will come about without the good and kind and brave--maybe the educated, too--step out as did the Indians to the British Occupiers as did the Black and the whites for civil rights face racist local communities and governments. Yes, step out NOT when it is safe. the child Malala did.
Jews might have chosen mercy in the times told of in the questionable bible. But with or without the account being a fact--the woman taken in adultery could be a tale told in the muslim community-- No? Who will stand to say --allow for mercy? The holy writings of both allow for it--if people aren't collectively cowards or else collectively mentally ill.
Point is this--can a community be brave enough to heal itself? Their own books holds the key--Education is in a lot of books. Including some of their holy writings.