Because public preception can differ greatly from the law of the land. I.e. just because it's legal doesn't mean the masses (or the media) will support it. We are trying to prevent the esculation of their recruitment into a much bigger conflict.
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We have before us an ordeal of the most grievous kind. We have before us many, many long months of struggle and of suffering. You ask what is our policy? I will say: It is to wage war, by sea, land, and air with all our might and all our strength that God can give us; to wage war against a monstrous tyranny, never surpassed in the dark, lamentable catalogue of human crime. That is our policy. You ask, What is our aim? I answer in one word: Victory Victory at all costs, victory in spite of all terror, victory, however long and hard the road may be; for without victory, there is no survival. Winston Churchill
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