Do not consider Collectivists as "sincere but deluded idealists". The proposal to enslave some men for the sake of others is not an ideal; brutality is not "idealistic," no matter what its purpose. Do not ever say that the desire to "do good" by force is a good motive. Neither power-lust nor stupidity are good motives.
Only the man who extols the purity of love devoid of desire, is capable of the depravity of a desire devoid of love.
Every movement that seeks to enslave a country, every dictatorship or potential dictatorship, needs some minority group as a scapegoat which it can blame for the nation's troubles and use as a justification of its own demands for dictatorial powers. In Soviet Russia, the scapegoat was the bourgeoisie; in Nazi Germany, it was the Jewish people; in America, it is the businessmen.