You can always judge a man by his enemies.
Cruz has all the right enemies :)
Even here on FR. Every one of these people either voted Romney, Demanded others abandon principle and vote GOP no matter what or called for lesser evil voting or an analogue term for it.
Without exception. One of the three. Cruz, who stands behind his beliefs even when others disagree, flies in the face of that. Ergo he is a hated purist.