Ed Hussein is someone who formerly supported Isil/jihad but is now equally opposed to it. I heard him interviewed recently, I think he said it's about 4 or 5 years since he rejected terrorism. He talked about finally realising and accepting that he's gay.
He blames his radicalisation on family life, although his parents were not jihadi they were devout and disliked western values. He said he grew up with these powerful influences which led him to believing jihad was the only way to live. He claimed that within his family and wider culture, there is no acceptance of homosexuality. He was brought up to believe homosexuals were either mentally ill or very bad people so repressed his own feelings until very recently.
Reports in the press this weekend about the key individuals in the Paris atrocity reminded me of this young man.