We National Socialists must hold unflinchingly to our aim in foreign policy, namely, to secure for the German people the land and soil to which they are entitled on this earth. And this action is the only one which, before God and our German posterity, would make any sacrifice of blood seem justified . . .

And I must sharply attack those folkish pen-pushers who claim to regard such an acquisition of soil as a 'breach of sacred human rights' and attack it as such in their scribblings. One never knows who stands behind these fellows. But one thing is certain, that the confusion they can create is desirable and convenient to our national enemies. By such an attitude they help to weaken and destroy from within our people's will for the only correct way of defending their vital needs. . . . Just as Germany's frontiers are fortuitous frontiers, momentary frontiers in the current political struggle of any period, so are the boundaries of other nations' living space.

But we National Socialists must go further. The right to possess soil can become a duty if without extension of its soil a great nation seems doomed to destruction. Germany will either be a world power or there will be no Germany. And for world power she needs that magnitude which will give her the position she needs in the present period, and life to her citizens.

:what's the main idea

The main idea of this passage is that National Socialists believe in securing land and soil for the German people as a crucial goal in foreign policy. They see it as a necessary sacrifice and view those who oppose this acquisition as enemies who weaken the will of the German people. They argue that the right to possess soil can become a duty if it is necessary for the survival and success of the nation.