The ideological puritans remind me of why the Libertarian party left me. They also remind me of the lunatic fringe on the left. Not with their idea of government, but the farther they go from the center, the less likely they are to ever be electable.
Vote with the Republicans, but hold their feet to the fire when they swing too far to the center.
How can you hold their feet to the fire other than by not voting for them?
Perhaps we could get enough churn with term limits to elect on principle rather than incumbency.