I am guessing that what LM thinks is that central issues of the Red Scare were "infilitration" of the government and the labor movement and so forth and not atrocities in distant lands and to use these matters after the fact to justify the Red Scares may be a subtle bit of POV. I think he has a point.
After sending the my last message, I noticed that he summarized this edit with:
The Red Scare was a US domestic issue, some of the issues are still disputed
so my analysis was correct.
V.