I disagree
The ideals you enumerate are considered conservative, to be sure, but not extremist, or "ultra," I don't think. It's the [anti-]social agenda being advanced by some conservatives that's considered poisonous. And the eagerness to infuse Christian fundamentalism into politics.
Granted, much of the Tea Party is trying to resist the social and religious aspects that threaten to dilute their message, but I fear they're trying to stop a tsunami of conservative indignation. They'll either succumb and morph into the GOP v2, or they'll continue to resist and be abandoned by furious right-wing statists.