Communism is an idea that promotes a global cooperation and socialism where all people participate in a working class and the efforts of the labor are shared. How could that kill anyone?
 "Is an idea that promotes"

Friend, I think history books are going to have some bad news for you.
So not less than a hundred million dead means nothing to this moron.  At his own show trial Nikolai Yezhov (AKA the bloody dwarf) who was Minister for Water transport and head of the NKVD during the bloodiest part of the Great Purge, actually admitted to murdering slave laborers by the thousands during the construction of a canal.

Oh, I suppose slave labor means nothing to that moron too.

And thanks to Mark Urbin.