It is very common for conservatives to publicly disagree. See, eg, McCain vs Bush or "conservatives against the Patriot Act."

And, as noted waaayyy back in the original post to this thread, a liberal columnist was the one fretting that too many on the left were letting anti-war sentiment make them anti-America.

All I'm doing is giving the "liberals" a chance to state their views, to speak on behalf of "their" side, and discuss the issue themselves.

Isn't defining themselves preferable to conservatives defining them instead?