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China is intriguing. Although high on the "Government Restriction" (horizontal) axis, it is quite low on the "Social Hostility" (vertical) axis. China has or will have the world's largest number of Christians.
North Korea (top right corner) is the hardest on Christ's people.
USA, for all our whining, is still a pretty safe and easy place by these measures, although I dare say a "temptation" measure might portray things as challenging through affluence, privacy/hidden opportunities, availability of vices, etc.
If you aren't already, please start praying for the persecuted church around the world.