rob: Rov B’ilos Achar HaBa’al. Ein Adam Meisim Atzmo Rasha. Chezkas Kashrus. These are legitimate Halachic concepts that can all be used to Mattir Mamzerim. They are not extra-Halachic and have applications in non-Mamzeirus issues. The opposition to Rav Goren was not only political. It was because he exceeded his bounds unilaterally. A Chareidi Rav attempting the same would have been blasted just as badly.
