China has been around for thousands of years,,
And they've been ruled by everything from Dynasties, Emperors, Warlords , Landlords ect.. and as of late Totalitarian Communism.
So the Chinese have long since learned that Nothing makes people Crazier harder to control than Politics and Religion.
Thus the reason the Chinese only have One political party and allow NO religion to challenge it's authority...
Since Christianity practiced in moderation, typically "Renders unto Ceasar what belongs to Ceasar" the Chinese Government will often tolerate the religion as long as it stays out of the Government's face & behaves itself under the common laws of the government.
But,,since the Muslim religion by it's own profession refuses to recognize any authority but an Islamic Theocracy, the refusal to moderate tends to get them in allot more trouble with the Chines Government.
The "American" government on the other hand, "by the consent of the governed" has a somewhat different Disassociation from religion in the 1st Amendment.
"Congress shall pass no law respecting any organized religion or prohibiting it's free practice" in-spite of seeming contradictions like laws that prohibit Polygamy, the allowing of Sharia Law Zones in some communities, and public religious displays.
In China, when religion starts to become a Pain in theaSS to the common order as dictated by the authority of the Government THEY just DON'T Put up with it...!