They see them, correctly, as legitimate objectives of the conservative movement. Which is why conservatives shouldn't care too much about libertarian griping. Yes, from time to time they advocate wacky stuff. But most of the time they're just fighting our battles under a different flag. You have to yell that loud when you're heckling from the nose-bleed seats.
Nobody feels they get the respect and attention they deserve from their hosts, but that's life.
This is something that Barry Goldwater, that great fusionist-conservative hero, understood. Barry Goldwater then had some sage advice. We are conservatives. This great Republican party is our historic house. This is our home.