"No communist manifesto ever required millions of people to be murdered, and claims to the contrary, or actions to that effect, are mere perversions."

Not perversions Shaw just simple well recorded fact - or the reality of the situation when a bunch of ideologists try to apply an unworkable political system to life and then find themselves totally inadequate for the job in hand. Instead of adapting their political ideals to match up to and cope with real problems they try in vain to alter how things actually happen in life to conform to their impossible ideas of how they think they should work - result utter chaos and total breakdown that has to be blamed on "someone else" - and that Stevie, old son, is when the purges and the mass blood-lettings begin.