It was a revolutionary text, although not imperfect itself.
As his #1 critic said:
” “material from American isolationist sources, the British pacifist press and even from Germany is taken as truth, British official pronouncements and the British press are assumed to be lying. His book is not an inquiry into propaganda; it is propaganda, of the most passionate sort.”
That said, he has a good point as long as it’s not taken to an extreme.
It is akin to today:
Many people have been trained over the last few years to believe unshakably that mainstream media is automatically lying in each and every thing.
But the reality is that it lies in some things but not in all things or necessarily even most things. There’s lies in truths and one has to be smart and rational.