bigotry hates privacy...
It is quite simple. Bigotry demands being able to judge and segregate from afar.
How you look (colour, body shape, facial features ,wealth).
How you sound (accent, language, education).
How you are different (displays of non-conformant belief, expressions of unwelcome humanity).
Ultimately bigotry hates the way you think, because this cannot be seen from afar to judge you. So digging this out is important to make you compliant.
That's why we need Privacy - freedom of speech does not exist where there is no freedom of thought.