"... British politicians too often treat the rise of the Shia as if this was purely the outcome of unjustifiable Iranian interference. Western leaders find it convenient to adopt the anti-Shia propaganda line pumped out by Sunni states like Saudi Arabia, which persecutes its own Shia minority, and Bahrain, which has an even more oppressed Shia majority.
In both countries, Shia demanding civil rights are punished as terrorists and alleged proxies of Iran. Often, the Sunni authorities are convinced by their own propaganda: when the Bahraini government, backed by Saudi troops, crushed the Arab Spring protests on the island in 2011, Shia doctors in a nearby hospital were tortured to make them admit that they were receiving orders from Iran, though a high-level international investigation found no evidence of Iranian involvement in the protests."