We can't expect to solve problems if all we do is tear each other down. You can disagree with a certain policy without demonizing the person who espouses it.
Upon the solution of this problem, or upon sufficient proof of the impossibility of synthetical knowledge a priori, depends the existence or downfall of metaphysics.
Saying this, he turned his head toward the window as if he were trying to solve the problems of human existence by concentrating on the beauty of the universe.