当时美国人口大概一亿五千万多，二千万完完全全没可能。正如QinJin所说

正如QinJin所说，It is vastly different in quantity and quality (treatment).  也正如你所说，"麦卡锡主义同毛泽东时代的镇压反革命、反右不可同日而语。"  Only people like 继开 will compare these two.

In fact, Mccarthism was quite popular at that time.  In January 1954, a Gallup poll found that 50% of the American public supported McCarthy, while 29% had an unfavorable opinion of the senator. Many ordinary Americans lent their support to McCarthyism. Of course, liberals hated Mccarthy, and they are controlling American media.