Glen Greenwald tries to make sense of what is going on in the minds of some hyper-partisan progressives:
The Progressive Mind (in some hyper-partisan precients):
(1) Rand Paul holds numerous horrendous positions. Therefore, it is impermissible ever to agree with or support him on any one specific issue. The minute one agrees with him on any one issue, one is infected with all his other views, no matter how much one disagrees with those other views.
(2) Barack Obama not only holds numerous horrendous positions, but actually does numerous heinous things (eg http://is.gd/5tKFC4,http://is.gd/GrHG86, http://is.gd/FpAt7a, http://is.gd/kNa9D0,http://is.gd/CmXP4F). Nonetheless, it is not only permissible - but mandatory - to support him not just on an issue-by-issue basis but for his general empowerment. One is free to support him and cheer for him without being infected by any of his heinous views and actions with which one disagrees.
I would give a big prize to anyone who can come close to reconciling those lines of reasoning.