It appears that China's government doesn't like organized Christianity, or any organized religion. It doesn't really matter what you personally believe. What matters though is anything that can influence people emotionally and philosophically, which basically means having control (thus power) over peoples' emotional and rational states of mind. Any place of congregation is potentially doing just that.
It's worrisome to see though that China has decided to go that extremely rigorous way, like burning crosses publicly and the like. Wow.