That's quite incorrect, as evidenced by libertarian support of both Roe and Lawrence, both radical activist decisions without a basis of support in the Constitution.
Gee, no republicans support Roe either, do they? You do love your sweeping generalizations. Roe should never have happened. Abortion should be a states rights issue. There are pro-life libertarians, just like there are pro-abortion republicans. Maybe you like the way the democrats treated their pro-life governor at the DNC national convention, when he wasn't allowed to speak, and think that republicans should act the same way.
Mark