I think mao said "too much" religions is poison referring to dalai lama fom tibet. He made those remarks when all those buddhist nun in tibet kept on praying all the time and did nothing to help the poor one. The buddhist nun used to get half of the food cultivated in a year from the very poor, where farmers were working so hard ,only half of the year was used for cultivation because of tibet geographical condition... you can find to fraction of buddhist ,one supporting mao and the other dalai lama........