And where would the Church of the Martyrs be today if they had not found favour with the Empire? Perhaps we should consider where the ancient and once thriving faith of the Zoroastrians stands today...what became of it when when their political support was destroyed...
The decline of the Zoroastrians came when it HAD political support. Armenian converted to Orthodox Christianity, the Iraqi heartland was Christian, Orthodox and otherwise, and the Iranian highlands were succuming to Christianity, Manichaeism and Buddhism.