First, "extreme" does not--basically or otherwise--mean the same thing as "pure" or "principled". Not generally, and not specifically in this context. That being said, characterizing the libertarians as extreme anything is, indeed, a generalized attempt to paint with broad strokes of discredit. Better to specifically reason against their ideals.
Second, Ayn Rand and her Objectivist 'principles' are ideological bunk masquerading as rational philosophy. Given your comments further down, in attempting to champion the need for a rational basis for policies, there is much irrationality in Rand's positions and ideology, and her ideas only trend toward sacrificing the many for the needs of the few. This opposes the purpose of civil society, as well as the cause and foundation of justice. Furthermore, we already have enough individualism going around. It has not made the world a better place.
Second, Ayn Rand and her Objectivist 'principles' are ideological bunk masquerading as rational philosophy. Given your comments further down, in attempting to champion the need for a rational basis for policies, there is much irrationality in Rand's positions and ideology, and her ideas only trend toward sacrificing the many for the needs of the few. This opposes the purpose of civil society, as well as the cause and foundation of justice. Furthermore, we already have enough individualism going around. It has not made the world a better place.