Conservatives don't "hate" Gingrich, he's not important enough to have that strong of a feeling about. We do not want him to be the Republican presidential candidate because he is a progressive, pro-amnesty, pro-single mandate, pro-global warming BS, professional lobbyist who will advance the big idea, big government, liberal cause. On top of that, he is probably the weakest candidate when it comes to defeating Obama. That's all, no hate.
In a debate about his shortcomings Newt would kick your ass.