That sounds as contrived as the notion he was a faithful Jew. There is no evidence to support the assertion Sotloff was traded/abducted.
Its more likely he went with ISIS voluntarily on account of his own pro Muslim views. He just found out being a fanatic champion of every Islamic terrorist group on the planet still mattered less than he was still an infidel American.
The T.E Lawrence of Jihadi Islam, he wasn’t. Talk about a deadly career path.
So it’s OK to not avenge his death? Kinda like Chris Stevens, eh?