Religious censorship sounds like it should be about protecting faith. The data says it is about policing the wrong faith. Take the domains each country blocks nationally in the Citizen Lab religion category — confirmed across at least three independent networks — and a sharp pattern appears: states do not block “religion,” they block the religious other — minority faiths, rival sects, and apostasy, each mapped to the country’s own official creed.
| Country | Religious sites blocked | What gets blocked |
|---|---|---|
| Iran (Shia theocracy) | 45 | Sunni Islamic sites (ahlesonnat, almeshkat, almoslim), Bahá’í content, and atheism (atheistalliance.org) |
| Indonesia | 10 | ex-Muslim / Islam-critical sites (answering-islam, faithfreedom) and hardline content alike |
| Saudi Arabia (Sunni) | 9 | Shia theology (aqaed.com) and Christian outreach (light-of-life.com) |
| Turkey | 4 | Gülen-movement sites (rumiforum.org) — targeted since the 2016 coup attempt |
| Russia | 2 | jw.org — the Jehovah’s Witnesses, banned as “extremist” |
Read across the right column and the logic is unmistakable. A Shia theocracy (Iran) blocks Sunni Islam, the Bahá’í faith, and atheism. A Sunni monarchy (Saudi Arabia) blocks Shia theology and Christian outreach. A nominally secular state mid-crackdown (Russia) blocks a single small denomination it has criminalized. Each government aims its religious filter outward, at whoever sits outside the sanctioned orthodoxy.
The external record confirms it
These are not inferences from domain names alone — the targeting is independently documented. Russia’s Supreme Court banned the Jehovah’s Witnesses as an “extremist” organization in April 2017, liquidating 395 congregations and blocking the group’s international website (USCIRF) — jw.org is exactly what Voidly sees blocked there. For Iran, the U.S. Commission on International Religious Freedom documents systematic targeting of Bahá’ís, Christians, Jews and Sunni Muslims, noting that authorities “restrict access to thousands of websites, particularly those addressing … religious minority groups” (USCIRF, Iran; Freedom House) — matching Iran’s 45 blocked sites, heavy on Sunni and Bahá’í content. The Voidly measurement layer and the human-rights record describe the same wall from two sides.
Honest caveats
(1) Counts cover only domains carrying Citizen Lab’s religion tag — a
curated list, a floor not a census; the per-domain affiliations above are the
clearest examples, not an exhaustive audit of every blocked site. (2) China is
near-absent here as a measurement artifact (the Great Firewall
registers as “anomaly,” not a confirmed block), not because it permits
religious content — its suppression of Falun Gong, Uyghur Islamic and
unregistered Christian content is extensive but does not surface in the confirmed
layer. (3) “Religion” as a category blurs into politics — some of
these blocks (Gülen sites in Turkey, Jehovah’s Witnesses in Russia) are
framed by the state as counter-extremism, which is precisely the point: the
religious label travels with the political one. The confirmed layer is a periodic
snapshot. Live: /v1/measurement/category-leaders?category=REL.