Another common, unspoken assumption is that spirituality is about calm and peace, and conflict is unspiritual. Which of course makes it hard to integrate the spiritual with the political, which is all about conflict.
In New Age circles, a common slogan is that "What you resist, persists." Truly spiritual people are never supposed to be confrontational or adversarial - that would be perpetuating an unevolved, "us-them" dualism.
I don't know from what spiritual tradition the "what you resist, persists" slogan originated, but I often want to ask those who blithely repeat it, "What's your evidence?" When it is so patently obvious that what you don't resist persists like hell and spreads all over the place. In fact, good, strong, solid resistance may be the only thing that stands between us and hell. Hitler didn't persist because of the Resistance - he succeeded in taking over Germany and murdering millions because not enough people resisted.