Where have all the real Republicans gone?

What ever happened to the GOP, the party that was all about small and sensible Government, lower taxes for the rich, war-mongering, gun-toting Republican? When did they become this white supremacist, low brow, trailer park trash, conspiracy theorist cult? There was a time where you could have a sensible debate with a Republican and while I didn't agree with their politics, you could respect them for their ideals and vision. Now it appears that the Tea Party has taken over the Republican party? But where have all the real Republicans gone? Into hiding?