“More Moslems came, and soon a small mosque was built, which attracted yet others. As long as Zoroastrians remained in the majority, their lives were tolerable; but once the Moslems became the more numerous, a petty but pervasive harassment was apt to develop. This was partly verbal, with taunts about fire-worship, and comments on how few Zoroastrians there were in the world, and how many Moslems, who must therefore posses the truth; and also on how many material advantages lay with Islam. The harassment was often also physical; boys fought, and gangs of youth waylaid and bullied individual Zoroastrians. They also diverted themselves by climbing into the local tower of silence and desecrating it, and they might even break into the fire-temple and seek to pollute or extinguish the sacred flame. Those with criminal leanings found too that a religious minority provided tempting opportunities for theft, pilfering from the open fields, and sometimes rape and arson. Those Zoroastrians who resisted all these pressures often preferred therefore in the end to sell out and move to some other place where their co-religionists were still relatively numerous, and they could live at peace; and so another village was lost to the old faith.”
Boyce, A Persian Stronghold of Zoroastrianism, pp. 7-8;