Theophobos not assasinated/executed

What if Theophobos was not executed by the Byzantine Emperor Theophilos, Theophobos is a friend of Theophilos and is Kurdish, is there any chance of him having the future Byzantine Emperor support a Christian and Zoroastrian rebellion in parts of Persia and is it possible for Theophobos to create a Christian Kingdom in Persia that is initially a Byzantine Vassal?
 
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