Observe that the Tea Party is on the brink of its first great achievement: Population replacement of whites by a voting majority of mestizos on welfare. (The two thousand page amnesty law, which we have to pass to learn what is in it, is being written by two Democratic Party immigration lawyers, and the usual government employees).
The psychological mechanism underlying this is that the overwhelming majority of politically active people are unwilling to speak or think ill of those to the left of them, perhaps because the left rules, and have no hesitation in demonizing of anyone to the right of them, perhaps because the right is powerless and afraid. Or perhaps it would be more accurate to say the non left, since no one wants to identify as right, and because there a thousand rights and only one left. The left is a thousand points of doctrine every single one of which must be affirmed, while whosoever disagrees on any one of these thousand points is deemed right wing, and deemed evil and hateful, not merely by the left, but by anyone less right wing than himself, and indeed by anyone who disagrees with the left on a different point of doctrine.
He who is subject to this mechanism, which is most of those in politics, has no friends to the right, no enemies to the left, which means all his friends are his enemies, and all his enemies are his friends, which means that he is always betraying, and always betrayed.
See for example Bryan Caplan vomiting the most extraordinarily hateful bile, as if possessed by demons, at those who oppose the importation of mass of low IQ voters to live on welfare and crime, and at those who think that fatherless children are prone to moral defects. But he would never dream of drawing the glaringly obvious conclusions from the “10:10 no pressure video”, that those who composed it are monsters, or notice massive and systematic fraud and conspiracy revealed by the Climategate files.
Whosoever argues that those to the left of him are merely mistaken, not malicious, despite many cases where malice is obvious, will argue that those to the right of him are malicious, even when honesty and decency is obvious, thus no enemies to the left, no friends to the right, thus all his friends are his enemies, thus always betraying and always betrayed, thus utterly untrustworthy. Any organization that contains such people will be destroyed from within. If you give such a person any power within the group, he will conspire with that groups enemies and commit fraud, theft, and violence.
Thus, for example, in the American Revolution, the British general Lord Howe not merely supplied Washington with gunpowder, but arranged for his men to die, in order to advantage Washington. ( See Sydney George Fisher’s True History of the American Revolution.) He deliberately caused the deaths of those near to him to advantage those far from him, the classic alliance with far against near so characteristic of leftism.
Quite simply: Unreasonable willingness to trust the powerful is a very reliable indication that someone is dangerously untrustworthy. So someone who supposedly agrees with you 99%, for example Bryan Caplan, except that he says that Obama is mistaken while he fails to notice that Obama hates America, Americans, and whites in particular, will stab you in the back, like Lord Howe, whereas someone who disagrees with you 100%, who thinks that Obama is the lightworker will merely stab you in the front.
We don’t need ideological purity. We do, however, need to be pure from those who grovel to power. Any organization that contains such people will move left, as the Tea Party did, regardless of what ideology they purport to have. If someone cannot read fraud and conspiracy in the climategate files, cannot read hatred of America and whites in Obama’s history, cannot see monsters in those authoring public education videos such as “10:10 No Pressure”, he can be relied upon to knife you in the back.
If your comrade cannot see evil, because power obscures his vision, then when you expect him to stand with you against power, he will stab you in the back.