The text mentions Mein Kampf. That’s a book that I heavily encourage people to read with a critical mindset, as it’s damn useful to know how the Nazi behave. Specially relevant here is VI, on war propaganda.

Why am I sharing this? Because it shows you how to resist propaganda: a sceptic, more intellectually inclined person who cares about truth and what is not being said, with a gut reaction against oversimplification and one-sidedness, and able to take their own decisions; that person will be abler to resist propaganda.

In internet times, perhaps not surprisingly propaganda comes often through simplistic memes. Not the big walls of WORDS WORDS that we at the left tend to produce, trying to inform people; because the goal (as Hitler himself said) is not informing, it’s changing your attitude towards something.

And the text being linked reinforces that, at:

As one writer has pointed out, if the propaganda is not in harmony with the individual and his desire, it is likely to be met by cynical skepticism.

In addition to all these things, a man’s own knowledge and information may cause him to hold to an opinion no matter how heavy the barrage of propaganda attempting to force him to change it.