I have dealt with all of these myths in my original post. Please go back and read them, as your reply is clearly knee-jerk. I will, however, clarify parts of your alleged purges.
Of the counter-revolutionaries convicted in the 1936-38 trials which has its roots in the history of the revolutionary movement in Russia. Millions of people participated in the victorious struggle against the Tsar and the Russian bourgeoisie, and many of these joined the Russian Communist Party. Among all these people there were, unfortunately, some who entered the party for reasons other than fighting for the proletariat and for socialism. But the class struggle was such that often there was neither the time nor the opportunity to put new party militants to the test. Even militants from other parties who called themselves socialists and who had fought the Bolshevik party were admitted to the Communist Party. A number of these new activists were given important positions in the Bolshevik Party, the state and the armed forces, depending on their individual ability to conduct class struggle. These were very difficult times for the young Soviet state, and the great shortage of cadres - or even of people who could read - forced the party to make few demands as regards the quality of new activists and cadres. Because of these problems, there arose in time a contradiction which split the party into two camps - on the one hand those who wanted to press forward in the struggle to build a socialist society, and on the other hand those who thought that the conditions were not yet ripe for building socialism and who promoted social-democracy. The origin of these ideas lay in Trotsky, who had joined the party in July 1917. Trotsky was able over time to secure the support of some of the best known Bolsheviks. This opposition united against the original Bolshevik plan provided one of the policy options which were the subject of a vote on 27 December 1927. Before this vote was taken, there had been a great party debate going on over many years and the result left nobody in any doubt. Of the 725,000 votes cast, the opposition secured 6,000 - i.e., less than 1% of party activists supported the united opposition.
As a consequence of the vote, and once the opposition started working for a policy opposed to that of the party, the Central Committee of the Communist Party decided to expel from the party the principal leaders of the united opposition. The central opposition figure, Trotsky, was expelled from the Soviet Union. But the story of this opposition did not end there. Zinoviev, Kamenev and Zvdokine afterwards made self-criticisms, as did several leading Trotskyists, such as Pyatakov, Radek, Preobrazhinsky and Smirnov. All of them were once again accepted into the party as activists and took up once more their party and state posts. In time it became clear that the self-criticisms made by the opposition had not been genuine, since the oppositionist leaders were united on the side of the counter-revolution every time that class struggle sharpened in the Soviet Union. The majority of the oppositionists were expelled and re-admitted another couple of times before the situation clarified itself completely in 1937-38.
deja lu again 
BUt I really like your consistency, makes me laugh every time 
