"The mocking, denigrating, ad-hominem attacks against Libertarians.
Then you wonder why Libertarians don't support Republicans on election day, particularily RINOs, and denigrate them even more when the RINO lose"
It's like watching children on a field playing. One group gets it's panties in a wad when things don't go their way, start name calling, bashing the other chilluns and basically throwing a tantrum.
What they fail to understand is, that kind of childish "I'm going to take my ball and go home" attitude, doesn't work well at getting people back on your team. So instead of saying "Ok we got our butts kicked, now let's figure out what WE did wrong and fix it." They point at everyone else and say "YOU didn't do what you were supposed to, we LOST because of YOU!"
Screw 'em
Judging by a lot of posts on this thread, it goes a lot farther than that, they're not just saying "it's your fault," they're saying "get lost and stay lost." Maybe they'll get their wish.
The fact that so many freepers consider individual freedom, personal liberty and limited government to be "liberal" constructs goes a long way toward explaining why libertarians might think twice about voting Republican.