Stalin is quoted as saying,
“No man, no problem.”
The Soviet Union made to disappear (murder) about 65 million of its citizens during its reign of terror. China is at least another 65 million.
It’s more common than you think or realize. After they disappear a citizen they just edit them out of photos, video, government files, etc.
"I would rather undertake to convert five thousand Lamanites [native Americans], than to convert one of those poor miserable creatures [Jews] whose fathers killed the savior... Yes, I would rather undertake to convert the devil himself, if it were possible... I would say, leave them, and come home, the Lord does not require you to stay there, for they must suffer and be damned... [L]eave them to live and die in their sins and ignorance... [T]hey take pleasure in their wickedness..." (FLDS/LDS "Prophet" Brigham Young, Journal of Discourses, Vol. 2, p. 143, 1854)
We've only lost about 45,000,000 who were worrisome so far.
(And that figure does NOT include ADULTS!)