one big reason was that he blamed the press, which was overwhelmingly owned by jews (same as today) for spreading defeatism during ww1 and costing them the war, in many people's opinion including hitler. the newspapers painted a very bad image and morale at home plummeted, leading to shortages of supplies and other problems. funny enough, the journalists also profited from this and were found to have ties with germany's enemies in ww1 later.
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