In the United States, Marxist communism is presented as all property in the hands of the state. This was not communism according to Marx, he saw the state as only serving the interests of an over class and thought it should be dissolved. In fact, Soviet leaders paid lip service to this idea until Khruschev.

Marx advocated that the state be turned into the revolutionary dictatorship of the proletariat before it was dissolved. The anarchist Bakunin criticized this idea as he didn't believe that the red bureaucrats would give up their power, he and the anarchist's didn't believe in taking over the state but dissolving the state. A popular anarchist conception of the ideal society is that power would rest in local, directly democratic workers councils who would be in confederation with other worker's councils. One should remember that this is largely how the Russian revolution happened - local worker's councils (Soviets) did most of the leg work. Then the Bolshevik party seized state power and stripped the Soviets of most of their power.

Leftist criticism of religion is not the same as criticism of Christ. Churches focus on certain aspects of Christianity - when I see the religious right on television, they are usually decrying the separation of church and state or homosexuals, how often do they focus on Jesus overturning the money changers tables in the temple or saying it's harder for a camel to get through the eye of a needle than a rich man into heaven? Some Christian traits are criticized - they say that the idea that people can suffer in this life and be rewarded in "the next life" prevents people from the arduous task of fixing things in this life. One really has to know more than just a short quote to get the context of what they're saying. Perhaps the best semi-modern book on how authoritarian religions and other authoritarian institutions affect people negatively can be found in a book by a student of Freud, Wilhelm Reich, The Mass Psychology of Fascism. It's a book about why a large percentage of the German people embraced fascism, something Reich witnessed first-hand in the early 1930's. For more understanding of Marx's view on religion, here's the context of his opium quote -

"Religious suffering is, at one and the same time, the expression of real suffering and a protest against real suffering. Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people.

The abolition of religion as the illusory happiness of the people is the demand for their real happiness. To call on them to give up their illusions about their condition is to call on them to give up a condition that requires illusions. The criticism of religion is, therefore, in embryo, the criticism of that vale of tears of which religion is the halo."