Subversion is a gradual and subtle process of changing thought and logic, then changing attitude, and then ultimately changing behavior.
An example of this subtlety is the world of academia, and university where discussion was previously supported and encouraged,
but now, contrary discussion is outright discouraged or denied.
Brainwashing is a coercive and involuntary abrupt change of behavior, without even bothering to change attitude; it is physical, and compels compliance.
An example of this physical change of behavior is most recently demonstrated by compelling compliance
to wear a R-95 face mask by government, industry, or university bureaucrats if you haven't already been *vaxxinated*(sic).
There is no longer any thought of privacy of your personal medical history supposedly defended by privacy laws; your mask is your physical symbol of compliance.
This article explains the tactics and methods of change employed by Socialism/ Communism.
It has become hijab. Demonstrated by Democrats afraid to NOT wear the masks though they have no disease risk due to vaccination or having had it.